Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

Connect one-on-one with {0} who will answer your question

Customer Question

MULTIPLE CHOICE. MUST SHOW WORK...

MULTIPLE CHOICE. MUST SHOW WORK FOR ENTIRE QUIZ.

1. (5 points) Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance.

A. 0.626<p<0.850

B.0.659<p<0.817

C. 0.644<p<0.832

D. 0.615<p<0.862

2. (5 points) The duration of telephone calls directed by a local telephone company: σ=4.2 minutes, n=500, 97% confidence. Use the confidence level and sample data to find the margin of error E.

A. 0.018 min

B. 0.008 min

C. 0.408 min

D. 0.087 min

3. (5 points) How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 98% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 10 minutes.

A. 68

B. 166

C. 136

D. 97

4. (5 points) Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution.

A. 85.89<µ<92.11

B. 86.21<µ<91.79

C. 87.08<µ<90.92

D. 85.88<µ<92.12

5. (5 points) α=0.05 for a two-tailed test. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

A. ±1.768

B. ±1.764

C. ±1.96

D. ±2.575

6. (5 points) In a sample of 47 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the P-value for a test of the claim that the proportion of all adults in the town that have been exposed to this strain of the flu is 8%.

A. 0.0024

B. 0.0524

C. 0.0228

D. 0.0048

7. (5 points) For a simple random sample, the size is n=17, σ is not known, and the original population is normally distributed. Determine whether the give conditions justify testing a claim about a population mean µ.

A. Yes

B. No

8. (5 points) A medical researcher claims that 20% of children suffer from a certain disorder. Indentify the type I error for the test.

A. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 20% when the percentage is actually 20%.

B. Reject the claim that the percentage of children who suffer from the disorder is equal to 20% when that percentage is actually 20%.

C. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 20% when that percentage is actually different from 20%.

D. Reject the claim that the percentage of children who suffer from the disorder is different from 20% when that percentage really is different from 20%.

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Express percents as decimals. Round dollar amounts to the nearest cent.

9. (15 points) It is commonly accepted that the mean temperature of human is 98.6oF. Yours truly XXXXX XXXXX better to do but measured the temperatures of 26 colleagues 1 to 4 times daily to get a total of 123 measurements. The collected data yielded a sample mean of 98.4oF and a sample standard deviation of 0.7oF. Is the mean temperature of his colleagues less than 98.6oF at the 0.01 significance level? Justify your answer with the proper statistics.

10. (15 points) My brother wants to estimate the proportion of Canadians who own their house. What sample size should be obtained if he wants the estimate to be within 0.02 with 90% confidence if

a. He uses an estimate of 0.675 from the Canadian Census Bureau?

b. He does not use any prior estimates?

11. (30 points)The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms). It is generally believed that growing teens are getting less than the RDA of 2.4 µg of cobalamine daily.

A not-to-be-named Pharmaceutical (ntbnP) peddles dietary supplements around the country. It is claimed by ntbnP representatives that by taking their vitamin supplement, teens will have the RDA of cobalamine. FDA is going to take on ntbnP to show that the supplement comes short of providing teens with the recommended RDA.

FDA managed to collect with a 24-hour period blood sample of 10 randomly selected teens around the country. The amounts of cobalamine (in µg) determined in these 10 randomly selected teens are given as follow:

1.85 2.35 1.87 1.90 1.37 2.35 2.55 2.28 1.95 2.49

Based on their national experience, FDA assumes that the the population standard deviation of cobalamine in teens to be 0.56 µg.

Now, you are asked to weigh in on the dispute between FDA and ntbnP.

a. (5 points) Given the above information, what kind of hypothesis test will you conduct

1. (5 points) Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance.

A. 0.626<p<0.850

B.0.659<p<0.817

C. 0.644<p<0.832

D. 0.615<p<0.862

2. (5 points) The duration of telephone calls directed by a local telephone company: σ=4.2 minutes, n=500, 97% confidence. Use the confidence level and sample data to find the margin of error E.

A. 0.018 min

B. 0.008 min

C. 0.408 min

D. 0.087 min

3. (5 points) How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 98% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 10 minutes.

A. 68

B. 166

C. 136

D. 97

4. (5 points) Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution.

A. 85.89<µ<92.11

B. 86.21<µ<91.79

C. 87.08<µ<90.92

D. 85.88<µ<92.12

5. (5 points) α=0.05 for a two-tailed test. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.

A. ±1.768

B. ±1.764

C. ±1.96

D. ±2.575

6. (5 points) In a sample of 47 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the P-value for a test of the claim that the proportion of all adults in the town that have been exposed to this strain of the flu is 8%.

A. 0.0024

B. 0.0524

C. 0.0228

D. 0.0048

7. (5 points) For a simple random sample, the size is n=17, σ is not known, and the original population is normally distributed. Determine whether the give conditions justify testing a claim about a population mean µ.

A. Yes

B. No

8. (5 points) A medical researcher claims that 20% of children suffer from a certain disorder. Indentify the type I error for the test.

A. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 20% when the percentage is actually 20%.

B. Reject the claim that the percentage of children who suffer from the disorder is equal to 20% when that percentage is actually 20%.

C. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 20% when that percentage is actually different from 20%.

D. Reject the claim that the percentage of children who suffer from the disorder is different from 20% when that percentage really is different from 20%.

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Express percents as decimals. Round dollar amounts to the nearest cent.

9. (15 points) It is commonly accepted that the mean temperature of human is 98.6oF. Yours truly XXXXX XXXXX better to do but measured the temperatures of 26 colleagues 1 to 4 times daily to get a total of 123 measurements. The collected data yielded a sample mean of 98.4oF and a sample standard deviation of 0.7oF. Is the mean temperature of his colleagues less than 98.6oF at the 0.01 significance level? Justify your answer with the proper statistics.

10. (15 points) My brother wants to estimate the proportion of Canadians who own their house. What sample size should be obtained if he wants the estimate to be within 0.02 with 90% confidence if

a. He uses an estimate of 0.675 from the Canadian Census Bureau?

b. He does not use any prior estimates?

11. (30 points)The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms). It is generally believed that growing teens are getting less than the RDA of 2.4 µg of cobalamine daily.

A not-to-be-named Pharmaceutical (ntbnP) peddles dietary supplements around the country. It is claimed by ntbnP representatives that by taking their vitamin supplement, teens will have the RDA of cobalamine. FDA is going to take on ntbnP to show that the supplement comes short of providing teens with the recommended RDA.

FDA managed to collect with a 24-hour period blood sample of 10 randomly selected teens around the country. The amounts of cobalamine (in µg) determined in these 10 randomly selected teens are given as follow:

1.85 2.35 1.87 1.90 1.37 2.35 2.55 2.28 1.95 2.49

Based on their national experience, FDA assumes that the the population standard deviation of cobalamine in teens to be 0.56 µg.

Now, you are asked to weigh in on the dispute between FDA and ntbnP.

a. (5 points) Given the above information, what kind of hypothesis test will you conduct

Show More

Show Less

Was this answer helpful?

Describe your issueThe assistant will guide you

Chat 1:1 with a tutorLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related Calculus and Above Questions

A psychologist is interested in the mean IQ score of a given

A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 14. The psychologist randomly selects 70 childr… read more

I need assistance understanding and completing this question

i need assistance understanding and completing this question Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test… read more

Assume that the data has a normal distribution and the

Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.05 for a two-tailed test … read more

Assume that the data has a normal distribution and the number

Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. = 0.05 for a two-tailed test. ±2.575 1.76… read more

Write the word or phrase that best completes each statement

Write the word or phrase that best completes each statement or answers the question. Express percents as decimals. Round dollar amounts to the nearest cent. 13. It is commonly accepted that the mean t… read more

5. Of 84 adults selected randomly from one town, 62 have health

5. Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance. A. 0.626

… read more

1. A random sample of 92 observers produced a mean X = 25.8

1. A random sample of 92 observers produced a mean X = 25.8 and a standard deviation s = 2.6. a) Find a 95% confidence interval for 11. b) Find the 90% confidence interval for Jl c) Find the 99% confi… read more

Use the given information to find the P-value. Also, use a

Use the given information to find the P-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis)… read more

An amusement park is considering the construction of an artificial

An amusement park is considering the construction of an artificial cave to attract visitors. The proposed cave can only accommodate 36 visitors at one time. In order to give everyone a realistic feeli… read more

1.Of 84 adults selected randomly from one town, 62 have health

1.Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance. A. 0.626

… read more

MULTIPLE CHOICE. Choose the one alternative that best completes

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. (5 points) Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% … read more

The following information is for the below Questions

The following information is for the below Questions The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms). It is generally believed that growing t… read more

Find the value of the test statistic z using z = W4Q3 The

Find the value of the test statistic z using z = W4Q3 The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statistics include n = 6… read more

Find the critical z value used to test a null hypothesis?

1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.09 for a right-tailed test. … read more

Sample of 45 home theatre systems has a mean price of $129.00

3. You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If the conv… read more

16. In a survey of 630 males ages 18-64, 391 say they have

16. In a survey of 630 males ages 18-64, 391 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and com… read more

Suppose that a 95% confidence interval for a population mean

Suppose that a 95% confidence interval for a population mean μ is given to be from 130 to 150. The 95% value in this statement indicates that: (choose the one best answer) a. P ( 130 < μ < 150 )… read more

Interested in social experiments, you want to estimate the

Interested in social experiments, you want to estimate the percentage of US adults willing to sing karaoke in front of strangers. You want to be within 3 percentage points of the true proportion measu… 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.

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 >

Mr. Gregory White

Master's Degree

114 satisfied customers

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

SusanAthena

Master's Degree

102 satisfied customers

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

Dr Arthur Rubin

Doctoral Degree

97 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.

Don

Master's Degree

29 satisfied customers

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

Kofi

PhD in Statistics

7,345 satisfied customers

Masters in Mathematics and Statistics

Sandhya_sharma

Master's Degree

5,309 satisfied customers

I hold M.Sc and M.Phil degrees in math and have several years of teaching experience.

< Previous | Next >

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.