The worldwide market share for a web browser was 20.5​% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

Question

b. Suppose that a sample of n=800 students at the same university​ (instead of n=240​) determines that 25​% of the sample use the web browser. At the 0.01 level of​ significance, is there evidence that the market share for the web browser at the university is greater than the worldwide market share of 20.5​%? Calculate the test statistic for the second sample.

Zstat = ?

Answer 1

Hi Ruman A.,

You've asked 6 questions, on the same topic, at the same time. That's spamming. And thus you won't get tutoring help to do your entire problem set for you. That's not the purpose of Ask-an-Expert.