Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 10: Q.10 (page 664)

Students’ self-concept Here is SAS output for a study of the self-concept of a random sample of seventh-grade students. The variable SC is the score on the Piers-Harris Self-Concept Scale. The analysis was done to see if male and female students differ in mean self-concept score .

Write a few sentences summarizing the comparison of females and males, as if you were preparing a report for publication

Short Answer

Expert verified

There is not enough proof to reject the claim that the population mean is equal for men and women.

Step by step solution

01

Given Information

02

Explanation

The hypotheses:

H0:μ1=μ2

H1:μ1≠μ2

The test statistic:

t=x¯1-x¯2s12n1+s22n1

=55.516-57.91512.696231+12.265247

=-0.8276

03

Explanation

Degrees of freedom:

df=62.8

The P-value is the chance of having the test statistic's value, or a number that is more extreme.

P=0.4110

If the P-value is equal or les than to the significance level, then the null hypothesis is rejected:

P>0.05⇒Fail to rejectH0

There is not enough proof to reject the claim that the population mean is equal for men and women.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Suppose the true proportion of people who use public transportation to get to work in the Washington, D.C., area is 0.45In a simple random sample of 250people who work in Washington , what is the standard deviation of the sampling distribution of p^?

(a) 0.4975

(b)0.2475

(c) 0.0315

(d) 0.0009

(e) 0.617

A surprising number of young adults (ages 19to 25) still live in their parents’ homes. A random sample by the National Institutes of Health included 2253men and 2629women in this age group. The survey found that 986of the men and 923of the women lived with their parents.

(a) Construct and interpret a 99%confidence interval for the difference in population proportions (men minus women).

(b) Does your interval from part (a) give convincing evidence of a difference between the population proportions? Explain.

A large university is considering the establishment of a schoolwide recycling program. To gauge interest in the program by means of a questionnaire, the university takes separate random samples of undergraduate students, graduate students, faculty, and staff. This is an example of what type of sampling design?

(a) Simple random sample

(b) Stratified random sample

(c) Convenience sample

(d) Cluster sample

(e) Systematic sample

Looking back on love How do young adults look back on adolescent romance? investigators interviewed couples in their mid-twenties. The female and male partners were interviewed separately. Each was asked about his or her current relationship and also about a romantic relationship that lasted at least two months when they were aged 15or16 . One response variable was a measure on a numerical scale of how much the attractiveness of the adolescent partner mattered. You want to compare the men and women on this measure.

Information online (8.2,10.1)A random digit dialing sample of 2092adults found that 1318 used the Internet.45Of the users, 1041said that they expect businesses to have Web sites that give product information; 294of the 774nonusers said this.

(a) Construct and interpret a 95%confidence interval for the proportion of all adults who use the Internet.

(b) Construct and interpret a 95% confidence interval to compare the proportions of users and nonusers who expect businesses to have Web sites
See all solutions

Recommended explanations on Math Textbooks

Statistics

Read Explanation

Probability and Statistics

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Discrete Mathematics

Read Explanation

Geometry

Read Explanation

Logic and Functions

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free