Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

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

Customer Question

19) A discrete variable...

19) A discrete variable

A. is an example of a qualitative variable

B. can assume only whole number values

C. can assume only certain clearly separated values

D. cannot be negative

20) A nominal scale variable

A. usually involves ranking.

B. cannot assume negative values

C. has meaningful zero point

D. is usually based on counting

21) The ratio scale of measurement

A. usually the result of counting something

B. has meaningful zero point

C. may assume negative values

D. cannot have more than two categories

22) In the world of market research, the use of a questionnaire often plays a vital role in gaining useful business intelligence because:

A. it is a structured technique to collect secondary data

B. it represents a way to ask anything you want from respondents and receive valid information

C. it does not need to be tested

D. it can be used in conjunction with other techniques such as field interviews and focus groups to maximize data input

23) A Type I error is

A. the correct decision

B. a value determined from the test statistic

C. rejecting the null hypothesis when it is true

D. accepting the null hypothesis when it is false

24) In a two-sample test of means for independent samples, we use the z distribution when

A. the population standard deviations are equal

B. both populations have at least 4,000 observations

C. both population standard deviations are known

D. nB and n(1-B) are both greater than 5

25) Which of the following is a requirement for a two-sample test of proportions?

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. nB and n(1-B) are both greater than 5.

26) Bob is interested in opening a candy store in his town. He believes that his customers will spend an average of $75 or more in annual purchases (the alternative hypothesis). Bob hires a consultant to test this belief. The consultant tested this conjecture on a sample of 100 customers and found the p-value for the test statistic satisfied p > 0.25, then

A. you would not reject the null hypothesis

B. you would reject the null hypothesis for alpha= 0.01

C. you would reject the null hypothesis for alpha= 0.05

D. you would reject the null hypothesis for alpha= 0.10

27) A carefully designed business experiment has just been concluded. Unfortunately, use of alpha = .05 indicated no significant differences among four treatments. What useful information can you supply future investigators when you report on this experiment?

A. The means are different but their variances are the same.

B. The estimated variance (and its df) can be useful to future investigators.

C. Pair-wise tests can be conducted to show significant differences.

D. Significant differences can be reported by changing the type I error rate from .05 to .10, .20, or whatever is needed to declare significance.

28) A correlation matrix

A. shows all simple coefficients of correlation between variables

B. shows only correlations that are zero

C. shoes the correlations that are positive

D. shows only the correlations that are statistically significant

29) The multiple standard error of estimate is

A. the measure of variability to the prediction

B. negative when one of the net regression coefficients is zero

C. found by calculating SSR/SS total

D. the measure of accuracy of the prediction

30) A dummy variable or indicator variable

A. may assume only a value of 0 or 1

B. is another term for the dependent variable

C. is a quantitative variable

D. is a variable at a ratio or interval level of measurement

A. is an example of a qualitative variable

B. can assume only whole number values

C. can assume only certain clearly separated values

D. cannot be negative

20) A nominal scale variable

A. usually involves ranking.

B. cannot assume negative values

C. has meaningful zero point

D. is usually based on counting

21) The ratio scale of measurement

A. usually the result of counting something

B. has meaningful zero point

C. may assume negative values

D. cannot have more than two categories

22) In the world of market research, the use of a questionnaire often plays a vital role in gaining useful business intelligence because:

A. it is a structured technique to collect secondary data

B. it represents a way to ask anything you want from respondents and receive valid information

C. it does not need to be tested

D. it can be used in conjunction with other techniques such as field interviews and focus groups to maximize data input

23) A Type I error is

A. the correct decision

B. a value determined from the test statistic

C. rejecting the null hypothesis when it is true

D. accepting the null hypothesis when it is false

24) In a two-sample test of means for independent samples, we use the z distribution when

A. the population standard deviations are equal

B. both populations have at least 4,000 observations

C. both population standard deviations are known

D. nB and n(1-B) are both greater than 5

25) Which of the following is a requirement for a two-sample test of proportions?

A. The population standard deviations are equal.

B. Both populations are positively skewed.

C. Both samples are at least 30.

D. nB and n(1-B) are both greater than 5.

26) Bob is interested in opening a candy store in his town. He believes that his customers will spend an average of $75 or more in annual purchases (the alternative hypothesis). Bob hires a consultant to test this belief. The consultant tested this conjecture on a sample of 100 customers and found the p-value for the test statistic satisfied p > 0.25, then

A. you would not reject the null hypothesis

B. you would reject the null hypothesis for alpha= 0.01

C. you would reject the null hypothesis for alpha= 0.05

D. you would reject the null hypothesis for alpha= 0.10

27) A carefully designed business experiment has just been concluded. Unfortunately, use of alpha = .05 indicated no significant differences among four treatments. What useful information can you supply future investigators when you report on this experiment?

A. The means are different but their variances are the same.

B. The estimated variance (and its df) can be useful to future investigators.

C. Pair-wise tests can be conducted to show significant differences.

D. Significant differences can be reported by changing the type I error rate from .05 to .10, .20, or whatever is needed to declare significance.

28) A correlation matrix

A. shows all simple coefficients of correlation between variables

B. shows only correlations that are zero

C. shoes the correlations that are positive

D. shows only the correlations that are statistically significant

29) The multiple standard error of estimate is

A. the measure of variability to the prediction

B. negative when one of the net regression coefficients is zero

C. found by calculating SSR/SS total

D. the measure of accuracy of the prediction

30) A dummy variable or indicator variable

A. may assume only a value of 0 or 1

B. is another term for the dependent variable

C. is a quantitative variable

D. is a variable at a ratio or interval level of measurement

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

3 questions Suppose a university advertises that its average

3 questions Suppose a university advertises that its average class size is 33 or less. A student organization is concerned that budget cuts have led to increased class sizes and would like to test thi… read more

2 questions In 2017, the average credit score for loans

2 questionsIn 2017, the average credit score for loans that were purchased by a government-sponsored mortgage loan company was 745. A random sample of 35 mortgages recently purchased by the company … read more

The ___________ is a parametric procedure used in a

The ___________ is a parametric procedure used in a one-sample experiment when the standard deviation of the population is unknown. Group of answer choicesz-testtwo-sample t-testone-sample t-testNone … read more

A New York charity recently did a fund raising campaign to

A New York charity recently did a fund raising campaign to support libraries. The following table gives the number of people who gave money at each fundraising level based on what region of the state … read more

I need these answered within the hour.. Please help! Given

I need these answered within the hour.. Please help! Given an observed difference between a sample mean of 42 and a hypothesized population mean of 50, you: a. must determine whether this observed dif… read more

Conduct a one-tailed hypothesis test given the information below

1. Conduct a one-tailed hypothesis test given the information below. A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the m… read more

A Chi square test has been conducted to assess the relationship

A Chi square test has been conducted to assess the relationship between marital status and church attendance. The obtained Chi square is 23.45 and the critical Chi square is 9.488. What may be conclud… read more

1. (Chapter 7: Estimating a Population Proportion) A poll

Attachment: 2014-06-28_022745_work.docx 1. (Chapter 7: Estimating a Population Proportion) A poll sample of 500 people was conducted if they support new initiative. 200 people said yes. Find the margi… read more

For problems 1 – 3 you are to use the p-value approach to test

For problems 1 – 3 you are to use the p-value approach to test the hypotheses where σ is known. 1.A university advises parents of incoming freshmen that the average cost of textbooks is typically grea… read more

For ryan. I have one more request about that exam and would

For ryan. I have one more request about that exam and would like to know what's a good time to post it.… read more

1. Assume that the data has a normal distribution and the

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 = 0.05 for a left-tailed test. -… read more

I need help with an intro to statistics quiz. It is 20 questions

I need help with an intro to statistics quiz. It is 20 questions multiple choice. It has to be done today and I have 2 hours.… read more

1) The main purpose of descriptive statistics is to A.

1) The main purpose of descriptive statistics is to A. summarize data in a useful and informative manner B. make inferences about a population C. determine if the data adequately represents the popula… read more

19) A discrete variable A. is an example of a qualitative

19) A discrete variable A. is an example of a qualitative variable B. can assume only whole number values C. can assume only certain clearly separated values D. cannot be negative 20) A nominal scale … read more

21) The ratio scale of measurement A. usually the result

21) The ratio scale of measurement A. usually the result of counting something B. has meaningful zero point C. may assume negative values D. cannot have more than two categories 22) In the world of ma… read more

1. The smaller the p-value, the more we doubt the null hypothesis?

1. The smaller the p-value, the more we doubt the null hypothesis? True or False. 2. If a null hypothesis is not rejected at a significance level of .05, it will ____ be rejected at a significance lev… read more

Find the mean for the given sample data. Unless indicated otherwise,

Find the mean for the given sample data. Unless indicated otherwise, round your answer to one more decimal place than is present in the original data values. The students in Hugh Logan's math class to… read more

For each of the following statements, state whether it is true

For each of the following statements, state whether it is true or false. If it is false, explain why. a) Sample evidence can be used to give proof that a null hypothesis is true. b) When testing a cla… 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

7,955 satisfied customers

Masters in Mathematics and Statistics

Sandhya_sharma

Master's Degree

18,287 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.