Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

Ask an Expert,

Get an Answer ASAP!

Customer Question

In a survey of 80...

In a survey of 80 high school football players who committed to play in the Division III CCIW conference, 64 said that they would work out in their high school weight rooms in the summer before college. The margin of error for the survey was 6%. A census of all CCIW football players (not just freshmen) showed that 59% worked out at their high schools. One can conclude that:

A. the subjects were less than forthcoming in their responses to the survey.

B. the sample was not representative of the population.

C. there must have been an error in the determination of the margin of error.

D. the census results are consistent with the confidence interval of the study.

A botany student counted 11 blades of grass in one square centimeter of

lawn and measured the lawn as a rectangle 61 m by 31 m. She reported

that there were 208,010,000 blades of grass in the lawn. The precision

of her conclusion:

A. correctly represents her measurements.

B. is less than her measurements warrant.

C. could be greater if she used a more precise calculator.

D. is excessive given her measurements.

The size of an e-mail file is stated as 210 kB, but the file size is actually 220.5 kB. What is the absolute error?

A. 5%

B. 10%

C. 10.5 kB

D. -10.5 kB

Temperatures in degrees Fahrenheit of the ocean at various depths:

A. Ratio

B. Interval

C. Ordinal

D. Nominal

Convert 5.65 to a percent.

A. 565%

B. 5.65%

C. 0.565%

D. 56.5%

A homeowner put a brand-name fertilizer/weed killer on half of his lawn and a generic fertilizer/weed killer on the other half. After three weeks, the generic side had 1 weed per square meter, the other side 1.7 weeds per square meter. The generic side required two mowings in the 3 weeks, the brand-name side one. The homeowner concluded that the generic was superior to the brand-name. Determine which evaluation guideline applies best in questioning the results of the described study.

A. Consider possible confounding variables.

B. Consider the sample.

C. Consider the type of study.

D. Consider the source.

Soft drink sizes: small, medium, large:

A. Qualitative, nominal

B. Quantitative, ordinal

C. Quantitative, ordinal, discrete

D. Qualitative, ordinal

Which is the best fertilizer for Mr. Jimenez’ backyard grass? Select the type of study most appropriate to the question.

A. Experimental

B. Experimental blinded

C. Case-controlled observational

D. Observational

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The other half of the group is given the same diet without the herb. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding.

A. The placebo effect

B. Method of assignment to treatment and control groups

C. Experimenter effect

D. The study is essentially free of confounding sources

Humanities majors spend an average of $115 per course on books.

Mathematics majors spend an average of $70 per course on books. What is

the percent difference between the two amounts relative to the amount

for mathematics majors (round to the nearest percent)?

A. 64%

B. 39%

C. 50%

D. 42%

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The other half of the group is given parsley with the same instructions and same diet. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding.

A. Placebo effect

B. Experimenter effect

C. Method of assignment to treatment and control groups

D. The study is essentially free of potential confounding.

Compared with a stopwatch that gives readings as --. - seconds, a stopwatch that gives readings as --. - - seconds is:

A. more accurate, but not necessarily more precise.

B. more precise and more accurate.

C. not necessarily more precise or more accurate.

D. more precise, but not necessarily more accurate.

Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the ‘Statistics Text Index’ number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value?

A. 20.0

B. 200.0

C. 50.0

D. 2.0

One month before a recall election, a poll of 500 Wisconsin voters showed that 46% planned to vote for the Democratic challenger Tom Barrett and 45% planned to vote for Republican Governor ***** *****. Undecided voters constituted another 9%. The margin of error was 5 percentage points. What conclusion can you draw from this poll?

A. Barrett will win the election.

B. Walker can’t get over 50% of the votes.

C. The race is too close to call.

D. No one will win.

Which data provide the answer to the question: “How frequently can a student at Eureka College be expected to study more than three hours a day?”

A. Of 100 students surveyed, 43 reported that they study at least three hours a day twice a week.

B. Of 100 students surveyed, 43 reported that they have studied at least three hours a day.

C. Of 100 students surveyed, 43 reported that they studied at least three hours a day twice last week.

D. Of 100 students surveyed, 43 reported that they intend to study at least three hours a day next week.

Compared with a metric scale that has grams as the smallest division, a scale with milligrams as the smallest division:

A. will guarantee measurements that are more accurate, but not necessarily more precise.

B. will guarantee measurements that are more precise and more accurate.

C. will guarantee measurements that are more precise, but not necessarily more accurate.

D. will not guarantee measurements that are more accurate or more precise.

A college student who does laundry infrequently wants to determine the effect of bluing on what should be white clothes. Select the sample most representative of the population.

A. Reports of two friends, one of whom was given bluing

B. The reports of an internet chatroom on laundry techniques

C. Two loads of personal wash, one with, one without bluing

D.

Two loads of wash, one personal, one of a friend, the bluing assigned by

a coin flip

A sample consists of every 49th student from a group of 496 students. Identify the type of sampling used.

A. Systematic

B. Cluster

C. Convenience

D. Random

A poll of 700 persons attending the Taste of Chicago showed that 455 persons, 65% of the sample, believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste. Statistics suggest that, although 65% plus or minus 5% of attendees believe that the food is overpriced, the Taste is a popular event. The raw data of the study is (are)

A. 65% of the sample.

B. 700 persons, 455 persons.

C. 1,250,000 persons, 700 persons, 455 persons.

D. (60%, 70%).

A. the subjects were less than forthcoming in their responses to the survey.

B. the sample was not representative of the population.

C. there must have been an error in the determination of the margin of error.

D. the census results are consistent with the confidence interval of the study.

A botany student counted 11 blades of grass in one square centimeter of

lawn and measured the lawn as a rectangle 61 m by 31 m. She reported

that there were 208,010,000 blades of grass in the lawn. The precision

of her conclusion:

A. correctly represents her measurements.

B. is less than her measurements warrant.

C. could be greater if she used a more precise calculator.

D. is excessive given her measurements.

The size of an e-mail file is stated as 210 kB, but the file size is actually 220.5 kB. What is the absolute error?

A. 5%

B. 10%

C. 10.5 kB

D. -10.5 kB

Temperatures in degrees Fahrenheit of the ocean at various depths:

A. Ratio

B. Interval

C. Ordinal

D. Nominal

Convert 5.65 to a percent.

A. 565%

B. 5.65%

C. 0.565%

D. 56.5%

A homeowner put a brand-name fertilizer/weed killer on half of his lawn and a generic fertilizer/weed killer on the other half. After three weeks, the generic side had 1 weed per square meter, the other side 1.7 weeds per square meter. The generic side required two mowings in the 3 weeks, the brand-name side one. The homeowner concluded that the generic was superior to the brand-name. Determine which evaluation guideline applies best in questioning the results of the described study.

A. Consider possible confounding variables.

B. Consider the sample.

C. Consider the type of study.

D. Consider the source.

Soft drink sizes: small, medium, large:

A. Qualitative, nominal

B. Quantitative, ordinal

C. Quantitative, ordinal, discrete

D. Qualitative, ordinal

Which is the best fertilizer for Mr. Jimenez’ backyard grass? Select the type of study most appropriate to the question.

A. Experimental

B. Experimental blinded

C. Case-controlled observational

D. Observational

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The other half of the group is given the same diet without the herb. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding.

A. The placebo effect

B. Method of assignment to treatment and control groups

C. Experimenter effect

D. The study is essentially free of confounding sources

Humanities majors spend an average of $115 per course on books.

Mathematics majors spend an average of $70 per course on books. What is

the percent difference between the two amounts relative to the amount

for mathematics majors (round to the nearest percent)?

A. 64%

B. 39%

C. 50%

D. 42%

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The other half of the group is given parsley with the same instructions and same diet. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding.

A. Placebo effect

B. Experimenter effect

C. Method of assignment to treatment and control groups

D. The study is essentially free of potential confounding.

Compared with a stopwatch that gives readings as --. - seconds, a stopwatch that gives readings as --. - - seconds is:

A. more accurate, but not necessarily more precise.

B. more precise and more accurate.

C. not necessarily more precise or more accurate.

D. more precise, but not necessarily more accurate.

Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the ‘Statistics Text Index’ number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value?

A. 20.0

B. 200.0

C. 50.0

D. 2.0

One month before a recall election, a poll of 500 Wisconsin voters showed that 46% planned to vote for the Democratic challenger Tom Barrett and 45% planned to vote for Republican Governor ***** *****. Undecided voters constituted another 9%. The margin of error was 5 percentage points. What conclusion can you draw from this poll?

A. Barrett will win the election.

B. Walker can’t get over 50% of the votes.

C. The race is too close to call.

D. No one will win.

Which data provide the answer to the question: “How frequently can a student at Eureka College be expected to study more than three hours a day?”

A. Of 100 students surveyed, 43 reported that they study at least three hours a day twice a week.

B. Of 100 students surveyed, 43 reported that they have studied at least three hours a day.

C. Of 100 students surveyed, 43 reported that they studied at least three hours a day twice last week.

D. Of 100 students surveyed, 43 reported that they intend to study at least three hours a day next week.

Compared with a metric scale that has grams as the smallest division, a scale with milligrams as the smallest division:

A. will guarantee measurements that are more accurate, but not necessarily more precise.

B. will guarantee measurements that are more precise and more accurate.

C. will guarantee measurements that are more precise, but not necessarily more accurate.

D. will not guarantee measurements that are more accurate or more precise.

A college student who does laundry infrequently wants to determine the effect of bluing on what should be white clothes. Select the sample most representative of the population.

A. Reports of two friends, one of whom was given bluing

B. The reports of an internet chatroom on laundry techniques

C. Two loads of personal wash, one with, one without bluing

D.

Two loads of wash, one personal, one of a friend, the bluing assigned by

a coin flip

A sample consists of every 49th student from a group of 496 students. Identify the type of sampling used.

A. Systematic

B. Cluster

C. Convenience

D. Random

A poll of 700 persons attending the Taste of Chicago showed that 455 persons, 65% of the sample, believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste. Statistics suggest that, although 65% plus or minus 5% of attendees believe that the food is overpriced, the Taste is a popular event. The raw data of the study is (are)

A. 65% of the sample.

B. 700 persons, 455 persons.

C. 1,250,000 persons, 700 persons, 455 persons.

D. (60%, 70%).

Show More

Show Less

Was this answer helpful?

A new question is answered every 9 seconds

How JustAnswer works:

- Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
- Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
- 100% Satisfaction GuaranteeRate the answer you receive.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal

...leave nothing to chance.

...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

Los Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

Hesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

Kernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

Woodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

Elkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

Dallas, TX

< Previous | Next >

SusanAthena

Master's Degree

102 satisfied customers

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

Mr. Gregory White

Master's Degree

99 satisfied customers

M.A., M.S. Education / Educational Administration

Dr Arthur Rubin

Doctoral Degree

58 satisfied customers

Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers

JACUSTOMER-yrynbdjl-

Master's Degree

42 satisfied customers

I have a MS in Mathematics and I have taught Mathematics for 10 years at the college level.

dhouse1940

Master's Degree

33 satisfied customers

BS mathematics, MS biostatistics, 35+ yrs designing & analyzing biological experiments.

Don

Master's Degree

29 satisfied customers

M.S. Astronautical Engineering. Math/Sci/Comp Tutor

mhasan420

Master's Degree

15 satisfied customers

BA Maths, Oxford

< Previous | Next >

Related Calculus and Above Questions

I have a lot of trouble with finding correlation by adding

Hi, I have a lot of trouble with finding correlation by adding n=15 two points to each of X values. There are n=15 pairs of X and Y values with Pearson correlation of r=0.40 … read more

I need to solve those two problems for Statistics. Questions

I need to solve those two problems for Statistics. Questions 1, and question 2 … read more

The total cholesterol levels of a sample of men aged 35-44

The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 225225 milligrams per deciliter and a standard deviation of 38.838.8 milligrams per deciliter.(a) W… read more

Looking at the winemaker question and am wondering if I came

Looking at the winemaker question and am wondering if I came to the correct solution … read more

Can you help me with these questions, they are stats

well, I need these answers asap. can you help they are the exact questions on the grid… read more

According to a report by the US Fish and Wildlife Service,

According to a report by the US Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolic River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. A… read more

I am really struggling with some of my economics stats

Hi! I am really struggling with some of my economics stats homework. Can you help me? Here is the question: A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 3… read more

I'm working on a statistics problem that I don't

Hi, I'm working on a statistics problem that I don't understand... In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 67.7 inches and a stan… read more

According to a study, brain weights of men in country A are

According to a study, brain weights of men in country A are normally distributed with mean 1.371.37 kg and standard deviation 0.160.16 kg. Apply the empirical rule to complete each sentence. Complete… read more

I'm taking a statistics quiz. I've taken this quiz 3 times

I've taken this quiz 3 times and can't pass it. applied managerial statistics … read more

A wheel with a radius of 500 mm has a mass of 35 kg and a

A wheel with a radius of 500 mm has a mass of 35 kg and a radius of gyration of 300 mm. A rope around the rim of the wheel provides a tangentle force of 2.0 N to the wheel which turns on an axle. Find… read more

I am new to this and I have some home work as well as

Hello I am new to this and I have some home work as well as quizzes that I need help with … read more

How much would it be to solve and show how you got the

How much would it be to solve and show how you got the solution for 15 questions. Business Statistics, Inferences and Linear Regression… read more

You helped me back in December with a Pearson Correlation. I

Hey Ryan,You helped me back in December with a Pearson Correlation.I was seeking your help in the same way with solving and describing SOME of the rationale behind the reasoning of the answer for anot… read more

I have completed a college assignment for statistics. It was

I have completed a college assignment for statistics. It was a forty question assignment and I was wanting to check my answers. Can you help me with that? … read more

I need homework help. Not understanding probability. A

Hi. I need homework help. Not understanding probability. … read more

A group of 16 students in the teacher credentialing program

A group of 16 students in the teacher credentialing program are working together to study for a test. After the test, they calculated their mean score to be 91%. The entire class mean was 88% with a s… read more

Need help with conditional probabilities and expectations.

hi pearl need help with conditional probabilities and expectations … read more

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.