menu
Sign up

Suppose the Proportion of First Year Students at a Particular

Question 43
Essay

Suppose the proportion of first year students at a particular university who purchased used textbooks in the past year is img and the proportion of second year students at the university who purchased used textbooks in the past year is img .A study found a 95% confidence interval for img is img Does this interval suggest that first year students are more likely than second year students to buy used textbooks? Explain.

Related questions
Q 44
Suppose the proportion of women who follow a regular exercise program is and the proportion of men who follow a regular exercise program is .A study found a 98% confidence interval for is Does this study provide strong evidence of a gender-based difference in exercise? Explain.
Q 45
A poll checking on the level of public support for a tax increase reported that 19% of the respondents were in favour.The pollsters reported a sampling error of ±5%.When the responses were broken down by gender,support was 3% higher among women than men.The pollsters said the margin of error for this difference was ±6%.Why is the margin of error larger for the difference in support between the genders than for the overall level of support?
Q 46
Suppose that you perform a two-proportion z-test and reject the null hypothesis that there is no difference in the two proportions.If that conclusion is actually wrong,which type of error did you commit?
logo
© 2020-2021 Cozyplus FZ LLC. All rights reserved