Math Homework

Ask Math Questions. Get Help With Your Math Homework

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

Customer Question

What are the critical z-values...

What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01?

A. ± 1.96

B. ± 2.33

C. ± 2.58

D. ± 1.65

2) In classical hypothesis testing, the test statistic is to the critical value what the __________.

A. ‘p-value’ is to alpha

B. critical value is to alpha

C. test statistic is to the ‘p-value’

D. level of significance is to the test statistic

3) For a hypothesis test of a single population mean at 95% confidence level, a calculated Z score of 1.7 supports the conclusion that

A. the population mean is greater than the hypothesized value

B. the null hypothesis cannot be rejected

C. the sample is biased

D. the population mean is less than expected

One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success. The value of the test statistic for a test of the equality of proportions is

A. -0.5319

B. 0.7293

C. -0.419

D. 0.2702

6) Weekly sales of iPods® at 20 Best Buy® stores are compared before and after installing a new eye-catching display. To determine if the display is effective in increasing sales, what type of statistical test would you perform?

A. Comparison of means using independent samples using a t-test

B. Comparison of proportions using independent samples using a z-test

C. Comparison of means using a paired z-test

D. Comparison of means using a paired t-test

7) When is it appropriate to use the paired difference t-test?

A. Four samples are compared at once.

B. Any two samples are compared.

C. Two independent samples are compared.

D. Two dependent samples are compared.

A. ± 1.96

B. ± 2.33

C. ± 2.58

D. ± 1.65

2) In classical hypothesis testing, the test statistic is to the critical value what the __________.

A. ‘p-value’ is to alpha

B. critical value is to alpha

C. test statistic is to the ‘p-value’

D. level of significance is to the test statistic

3) For a hypothesis test of a single population mean at 95% confidence level, a calculated Z score of 1.7 supports the conclusion that

A. the population mean is greater than the hypothesized value

B. the null hypothesis cannot be rejected

C. the sample is biased

D. the population mean is less than expected

One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success. The value of the test statistic for a test of the equality of proportions is

A. -0.5319

B. 0.7293

C. -0.419

D. 0.2702

6) Weekly sales of iPods® at 20 Best Buy® stores are compared before and after installing a new eye-catching display. To determine if the display is effective in increasing sales, what type of statistical test would you perform?

A. Comparison of means using independent samples using a t-test

B. Comparison of proportions using independent samples using a z-test

C. Comparison of means using a paired z-test

D. Comparison of means using a paired t-test

7) When is it appropriate to use the paired difference t-test?

A. Four samples are compared at once.

B. Any two samples are compared.

C. Two independent samples are compared.

D. Two dependent samples are compared.

Show More

Show Less

Was this answer helpful?

Describe your issueThe assistant will guide you

Chat 1:1 with a math tutor or teacherLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related Math Homework Questions

, would you be willing to help me with a statistics

hello, would you be willing to help me with a statistics assignment due in the next hour twenty minutes? 200-level basic questions, only 25 1. Which of the following terms is not required when using t… read more

) What are the critical z-values for a two-tailed hypothesis

) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01? A. ± 1.96 B. ± 2.33 C. ± 2.58 D. ± 1.65 2) In classical hypothesis testing, the test statistic is to … read more

For Steve, One hundred women were polled and 60 reported successfully

For Steve, One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success. The value of the … read more

1) What are the critical z-values for a two-tailed hypothesis

1) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01? A. ± 2.33 B. ± 1.65 C. ± 2.58 D. ± 1.96 2) The normally distributed AAA battery life is stated to be… read more

One hundred women were polled and 60 reported successfully

One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success. The value of the test statis… read more

One hundred women were polled and 60 reported successfully

One hundred women were polled and 60 reported successfully communicating an automobile problem to an auto repairman. A sample of 150 men had 95 reporting the same success. The value of the test statis… read more

) When testing for differences between two means, the Behrens-Fisher

) When testing for differences between two means, the Behrens-Fisher problem arises when the sample populations are A. are non-normal and have unequal variances. B. are non-normal and have equal varia… read more

10) A recent study by College Stat Company reported a nationwide

10) A recent study by College Stat Company reported a nationwide survey of college students determined that students spend 2 hours studying for each hour in the classroom. Professor Baker at State Col… read more

10) A recent study by College Stat Company reported a nationwide

10) A recent study by College Stat Company reported a nationwide survey of college students determined that students spend 2 hours studying for each hour in the classroom. Professor Baker at State Col… read more

Section 1 1) 17” is an appropriate null hypothesis. A.

Section 1 1) “µ = 17” is an appropriate null hypothesis. A. True B. False 2) The value that separates a rejection region from a non-rejection region is called the test statistic. A. True B. False 3) I… read more

1) If a hypothesis test has a level of significance of 5%,

1) If a hypothesis test has a level of significance of 5%, that means if the null is true, we don't reject it 5% of the time. A. True B. False 2) “µ = 17” is an appropriate null hypothesis. A. True B.… read more

5) In classical hypothesis testing, the test statistic is to

5) In classical hypothesis testing, the test statistic is to the critical value what the ________________. A. level of significance is to the test statistic B. test statistic is to the p-value C. p-va… read more

1) If a hypothesis test has a level of significance of 5%,

1) If a hypothesis test has a level of significance of 5%, that means if the null is true, we don't reject it 5% of the time. A. True B. False 2) “µ = 17” is an appropriate null hypothesis. A. True B.… read more

In what ways is the t distribution similar to the standard

In what ways is the t distribution similar to the standard normal distribution? In what ways is the t distribution different from the standard normal distribution? How does the formula for the t test … read more

By the end of Day 4, complete and submit your answers to the

By the end of Day 4, complete and submit your answers to the Dropbox for each of the questions below. The facilitator will start a discussion thread around issues found in the assignment. Please watch… read more

T F 1. If the null hypothesis states that there is no

T F 1. If the null hypothesis states that there is no difference between the mean income of males and the mean income of females, then the test is one-tailed. T F 2. If we are testing for the differen… read more

Question for Greg Michaelson DUE 3/21/09 1. In what ways is

Question for Greg Michaelson DUE 3/21/09 1. In what ways is the t distribution similar to the standard normal distribution? In what ways is the t distribution different from the standard normal distri… read more

Part I T/F & Multiple Choice 1. For a specific confidence

Part I T/F & Multiple Choice 1. For a specific confidence interval, the larger the sample size, the smaller the maximum error of estimate will be. _____ T/F 2. An estimator is consistent if, as the sa… 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 >

Manal Elkhoshkhany

Bachelor's Degree

367 satisfied customers

I have completed my BA degree in 1988, and graduated with a GPA of 4.0.

Jabi

Tutor

171 satisfied customers

I've been an Expert on JustAnswer since July 2010

Mr. Gregory White

Master's Degree

113 satisfied customers

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

Dr Arthur Rubin

Doctoral Degree

77 satisfied customers

Ph.D. in Mathematics, California Institute of Technology

JACUSTOMER-yrynbdjl-

Master's Degree

49 satisfied customers

I have taught college Mathematics for the past 10 years.

SusanAthena

Master's Degree

41 satisfied customers

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

Don

Master's Degree

17 satisfied customers

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

< 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.