Pre-Calculus

Have pre-calculus questions? Ask a pre-calculus tutor

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

3.5, a data point at...

1. In a sample with mean x = 12 and standard deviation s = 3.5, a data point at 16.8 would have what sample z-score?

A. 4.8 B. We can't know the answer without knowing the population mean μ and standard deviationσ. C. 1.4 D. 1.37

2. Which of the following statements about interpreting standard deviation is true?

A. Chebyshev's Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. The Empirical Rule can be applied to any data set, regardless of the shape of its frequency distribution.

B. The Empirical Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. Chebyshev's Rule can be applied to any data set, regardless of the shape of its frequency distribution.

C. Neither Chebyshev's Rule nor the Emprical Rule require any assumptions about the frequency distribution.

D. Neither the Empirical Rule nor Chebyshev's Rule can be applied to data unless the frequency distribution is mound-shaped and symmetrical.

3. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the median of this data sample?

A. There's no median value.B. 9.25 C. 8 D. 7

4. Which of the following are parameters of a population?

_

A. σ and n B. μ and x C. μ and σ D. α and σ

5. Which of the following statements is true about a stem-and-leaf plot?

A. It separates data at the decimal point, creating horizontal rows whose values are close together.

B. Stem-and-leaf plots are histograms whose bars have been arranged in decreasing order of frequency.

C. It involves creating columns of dots, one for each datum in the sample.

D. It uses vertical bars to illustrate a probability distribution.

6. When a sample is taken from a larger population, this suggests that which of the following will be used?

A. Independent events B. Computation of a sample mean

C. Inferential statistics D. Descriptive statistics

7. When creating a histogram, it's important to ensure that the classes of data satisfy which properties?

A. They must include each interval on the number line.

B. They must be all the same size.

C. They must be mutually exclusive and exhaustive.

D. No requirements are made; the individual creating the graph is free to choose any classes.

8. To answer the question, refer to the following data.

Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6

What is the standard deviation for the data values?

A. 2.84 B. 1.44 C. 2.56 D. 1.687

9. To answer the question, refer to the following data.

Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6

What is the variance for the data values?

A. 1.687 B. 2.56 C. 1.6 D. 2.844

10. If there are an odd number of data values in a set, the median will be the

A. average of all of the values divided by the number of values in the set.

B. average of the two end values.

C. value that appears the greatest number of times.

D. value that appears in the center.

11. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the range of this data sample?

A. 4 B. 18 C. 6 D. 10

12. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the mean of this data sample?

A. There's no mean value. B. 8 C. 7 D. 9.25

13. Which of the following involves inferential statistics as opposed to descriptive statistics?

A. A local cable system, using a sample of 500 subscribers, estimates that 40 percent of its subscribers watch a premium channel at least once per day.

B. A class of 50 statistics students earned an average grade of 73.5.

C. The Alcohol, Tobacco and Firearms department reported that Houston had 1,791 registered gun dealers in 1997.

D. The city business office reported 35 building permits for new single-family housing units.

14. What is the difference between a histogram and a bar chart?

A. The adjacent rectangles in a bar chart have a gap, while those for a histogram don't.

B. A histogram reflects qualitative data, while the bar chart represents quantitative data.

C. The adjacent rectangles in a histogram have a gap, while those for a bar chart don't.

D. A histogram and a bar chart both reflect qualitative data.

15. A population is a collection of _______ about which we will measure certain characteristics or

properties, called _______.

A. data,numbers B.individuals, sample valuesC. experimental units, variablesD. people, traits

LargeAirlines $4.36,6.19, -0.42,3.73,0.26,6.27 Small Airlines $1.60,-1.98,1.06,-0.21,-1.15 4.49,0.59,1.52,1.97,4.57,0.05

16. A study was conducted of the 12-month earnings per share for two categories of airline companies,with the result shown in the chart above.

Based

A. 4.8 B. We can't know the answer without knowing the population mean μ and standard deviationσ. C. 1.4 D. 1.37

2. Which of the following statements about interpreting standard deviation is true?

A. Chebyshev's Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. The Empirical Rule can be applied to any data set, regardless of the shape of its frequency distribution.

B. The Empirical Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. Chebyshev's Rule can be applied to any data set, regardless of the shape of its frequency distribution.

C. Neither Chebyshev's Rule nor the Emprical Rule require any assumptions about the frequency distribution.

D. Neither the Empirical Rule nor Chebyshev's Rule can be applied to data unless the frequency distribution is mound-shaped and symmetrical.

3. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the median of this data sample?

A. There's no median value.B. 9.25 C. 8 D. 7

4. Which of the following are parameters of a population?

_

A. σ and n B. μ and x C. μ and σ D. α and σ

5. Which of the following statements is true about a stem-and-leaf plot?

A. It separates data at the decimal point, creating horizontal rows whose values are close together.

B. Stem-and-leaf plots are histograms whose bars have been arranged in decreasing order of frequency.

C. It involves creating columns of dots, one for each datum in the sample.

D. It uses vertical bars to illustrate a probability distribution.

6. When a sample is taken from a larger population, this suggests that which of the following will be used?

A. Independent events B. Computation of a sample mean

C. Inferential statistics D. Descriptive statistics

7. When creating a histogram, it's important to ensure that the classes of data satisfy which properties?

A. They must include each interval on the number line.

B. They must be all the same size.

C. They must be mutually exclusive and exhaustive.

D. No requirements are made; the individual creating the graph is free to choose any classes.

8. To answer the question, refer to the following data.

Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6

What is the standard deviation for the data values?

A. 2.84 B. 1.44 C. 2.56 D. 1.687

9. To answer the question, refer to the following data.

Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6

What is the variance for the data values?

A. 1.687 B. 2.56 C. 1.6 D. 2.844

10. If there are an odd number of data values in a set, the median will be the

A. average of all of the values divided by the number of values in the set.

B. average of the two end values.

C. value that appears the greatest number of times.

D. value that appears in the center.

11. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the range of this data sample?

A. 4 B. 18 C. 6 D. 10

12. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What is the mean of this data sample?

A. There's no mean value. B. 8 C. 7 D. 9.25

13. Which of the following involves inferential statistics as opposed to descriptive statistics?

A. A local cable system, using a sample of 500 subscribers, estimates that 40 percent of its subscribers watch a premium channel at least once per day.

B. A class of 50 statistics students earned an average grade of 73.5.

C. The Alcohol, Tobacco and Firearms department reported that Houston had 1,791 registered gun dealers in 1997.

D. The city business office reported 35 building permits for new single-family housing units.

14. What is the difference between a histogram and a bar chart?

A. The adjacent rectangles in a bar chart have a gap, while those for a histogram don't.

B. A histogram reflects qualitative data, while the bar chart represents quantitative data.

C. The adjacent rectangles in a histogram have a gap, while those for a bar chart don't.

D. A histogram and a bar chart both reflect qualitative data.

15. A population is a collection of _______ about which we will measure certain characteristics or

properties, called _______.

A. data,numbers B.individuals, sample valuesC. experimental units, variablesD. people, traits

LargeAirlines $4.36,6.19, -0.42,3.73,0.26,6.27 Small Airlines $1.60,-1.98,1.06,-0.21,-1.15 4.49,0.59,1.52,1.97,4.57,0.05

16. A study was conducted of the 12-month earnings per share for two categories of airline companies,with the result shown in the chart above.

Based

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 Pre-Calculus Questions

10. Which of the following statements is true for a

10. Which of the following statements is true for a symmetric distribution?a. The mean is greater than the median. b. The mean is less than the median. c. The mean and median are equal. d. None of the… read more

A population of values has a normal distribution with μ =

A population of values has a normal distribution with μ = 212.5 and σ = 93.1 . A random sample of size n = 30 is drawn.Find the probability that a single randomly selected value is between 205.7 and 2… read more

We want to conduct a hypothesis test of the claim that the

We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.6 words per minute. So, we choose a random sample of students' reading s… read more

Approximately 60% of college students in the US were able to

Approximately 60% of college students in the US were able to finish their batchelors degree in 6 years. Use this population proportion to create a sampling distribution with sample size 10 with stat k… read more

COLLEGE STATISTICS PROBLEM A community college Math

COLLEGE STATISTICS PROBLEMA community college Math instructor feels that the average age of community college students decreased since they started teaching 25 years ago. Looking up data from the year… read more

I would like the answers to a set of questions on this site

I would like the answers to a set of questions on this site that you have answered … read more

hi do you still have the answers to the these questions Assume

hi do you still have the answers to the these questions Assume the following data were gathered by a manufacturer of a robotics component, in units of days of continuous use until the component fails.… read more

2. Assume the following data were gathered by a manufacturer

2. Assume the following data were gathered by a manufacturer of a robotics component, in units of days of continuous use until the component fails. There are 60 measurements in this data set. Show a h… read more

I see where you have already answered a homework assignment

I see where you have already answered a homework assignment the same as this. Please let me know what the charge will be to get the answers. Questions 1 to 20: Select the best answer to each question.… read more

"For John Only " Hi John.. I noticed you have answered

"For John Only " Hi John.. I noticed you have answered similiar questions to the ones I would like for you to help me with. Hopefully you will be able to. 1. The commissioner of the state police is re… read more

1. What is the primary reason for applying a finite population correct

1. What is the primary reason for applying a finite population correction coefficient? A. When the sample is a very small portion of the population, the correction coefficient is required. B. If you d… read more

FOR SCOTT ONLY, Scott think you can have this for me today?

FOR SCOTT ONLY, Scott think you can have this for me today? Seems pretty simple just matching things up...Also are you free tonight to do the math lab stuff for this week same time as usual like 6:15 … read more

FOR SCOTT ONLY, Hey Scott hope you had a great labor day

FOR SCOTT ONLY, Hey Scott hope you had a great labor day weekend. Today is my first day of that Statistics class. These are the first two questions that need a 4 to 5 sentence answer for each.If you c… read more

25) How much money would we need to pay off a $2,000 loan at

25) How much money would we need to pay off a $2,000 loan at 8% interest, 4 years from now? A. $3,220 B. $2,721 C. $1,978 D. $2,632 26) When interest is compounded, the total time period is subdivided… read more

10) Solve the system of equations: 3x – 5y = 7 2x + 3y =

10) Solve the system of equations: 3x – 5y = 7 2x + 3y = 30 A. { (–1,–2) } B. { (3,8) } C. { (9,4) } D. { (6,1) } 11) Solve the system of equations: 3x + 2y = 18 y = 3x A. { (1,3) } B. { (3,9) } C. { … read more

HiI wonder if you could help me with this:Use the boxplots

Attachment: 2012-04-22_143018_dataplotter_.docx Hi I wonder if you could help me with this: Use the boxplots to answer the following: (i) How do the average weights of powder in the bags compare gener… read more

HO: µ = 70 H1: µ > 70 σ = 20, n = 100, xbar = 80, α = .01 a)

HO: µ = 70 H1: µ > 70 σ = 20, n = 100, xbar = 80, α = .01 a) calculate the value of the test statistic b) set up the rejection region. c) determine the p-value d) interpret the results… read more

1. a) given the following hypotheses, determine the p-value

1. a) given the following hypotheses, determine the p-value when xbar = 21, n = 25, and σ = 5. Ho : µ = 20 H1 : µ ≠ 20 b) repeat part (a) with xbar = 22. c) repeat part (a) with xbar = 23. d) describe… 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

168 satisfied customers

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

JACUSTOMER-yrynbdjl-

Master's Degree

13 satisfied customers

I have taught college Mathematics for the past 10 years.

Dr. Arthur Rubin

Doctoral Degree

12 satisfied customers

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

Trinity T

Educator

15,201 satisfied customers

Highly-Qualified Educator

Kofi

PhD in Statistics

11,563 satisfied customers

Masters in Mathematics and Statistics

Scott

MIT Graduate

2,046 satisfied customers

Over 13,000 accepts & 100% feedback in the old math category

Sandhya_sharma

Master's Degree

1,535 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.