8.4.67

A poll asked college students in 2016 and again in 2017 whether they believed the First Amendment guarantee of freedom of the press was secure or threatened in the country today. In2016, 2451

of 3071 students surveyed said that freedom of the press was secure or very secure. In2017,

1780 of 2021 students surveyed felt this way.

H0: p1=p2

Ha: p1p2

Z=-7.70

P value is 0.0000

Since thep-value is less than the significance level of =0.01, reject he null hypothesis. There is sufficient

evidence to support the claim that the 2016 proportion is different from the 2017 proportion.

above is the information i resolved and is correct but how do i do the second part? please show work, so i know what numbers to plug in where.

do i use a calculator and if so what do i press? below is the question:

Use the sample data to construct a 98% confidence interval for the difference in the proportions of college students in 2016 and 2017 who felt freedom of the press was secure or very secure. How does your confidence interval support your hypothesis testconclusion?

The 98% confidence interval i