Two hundred census tracts in a city are selected at random.It is found that 100 of these tracts are serviced by a community center; the others are not. You compare the delinquency rates for these two types of tracts and obtain the following sample results: Without Center With Center Sample Size 100 100 Mean Delinquency Rate 35 25 Standard Deviation 8 6 Test the null hypothesis that there is no difference in the delinquency rates for the two types of tracts. Use a significance level of .05. From the data in problem #1, construct a 95% confidence interval around the difference in population means.Interpret your answer. For the following random samples of scores, test the null hypothesis that the mean of population A is less than or equal to the mean of population B.Use a significance level of .05. (Note that you will first need to calculate the sample means and sample standard deviations.) Sample A Sample B 15 10 18 11 12 12 17 10 19 10 In a recent poll, 70% of the 600 female respondents said they would vote for a woman president, while 50% of the 500 male respondents said they would vote for a woman president. Construct a 95% confidence interval around the difference in population proportions. Test the null hypothesis that the percentage of females who would vote for a woman president is less than or equal to the percentage of males who would so vote. Use a significance level of .05.

Two hundred census tracts in a city are selected at random.It is found that 100 of these tracts are serviced by a community center; the others are not. You compare the delinquency rates for these two types of tracts and obtain the following sample results: Without Center With Center Sample Size 100 100 Mean Delinquency Rate 35 25 Standard Deviation 8 6 Test the null hypothesis that there is no difference in the delinquency rates for the two types of tracts. Use a significance level of .05. From the data in problem #1, construct a 95% confidence interval around the difference in population means.Interpret your answer. For the following random samples of scores, test the null hypothesis that the mean of population A is less than or equal to the mean of population B.Use a significance level of .05. (Note that you will first need to calculate the sample means and sample standard deviations.) Sample A Sample B 15 10 18 11 12 12 17 10 19 10 In a recent poll, 70% of the 600 female respondents said they would vote for a woman president, while 50% of the 500 male respondents said they would vote for a woman president. Construct a 95% confidence interval around the difference in population proportions. Test the null hypothesis that the percentage of females who would vote for a woman president is less than or equal to the percentage of males who would so vote. Use a significance level of .05.

Social Psychology (10th Edition)

10th Edition

ISBN:9780134641287

Author:Elliot Aronson, Timothy D. Wilson, Robin M. Akert, Samuel R. Sommers

Publisher:Elliot Aronson, Timothy D. Wilson, Robin M. Akert, Samuel R. Sommers

Chapter1: Introducing Social Psychology

Section: Chapter Questions

Problem 1RQ1

See similar textbooks

Related questions

Question

Two hundred census tracts in a city are selected at random.It is found that 100 of these tracts are serviced by a community center; the others are not. You compare the delinquency rates for these two types of tracts and obtain the following sample results:

Without Center With Center

Sample Size 100 100

Mean Delinquency Rate 35 25

Standard Deviation 8 6

Test the null hypothesis that there is no difference in the delinquency rates for the two types of tracts. Use a significance level of .05.

From the data in problem #1, construct a 95% confidence interval around the difference in population means.Interpret your answer.

For the following random samples of scores, test the null hypothesis that the mean of population A is less than or equal to the mean of population B.Use a significance level of .05. (Note that you will first need to calculate the sample means and sample standard deviations.)

Sample A Sample B

15 10

18 11

12 12

17 10

19 10

In a recent poll, 70% of the 600 female respondents said they would vote for a woman president, while 50% of the 500 male respondents said they would vote for a woman president.

Construct a 95% confidence interval around the difference in population proportions.

Test the null hypothesis that the percentage of females who would vote for a woman president is less than or equal to the percentage of males who would so vote. Use a significance level of .05.

Expert Solution