A local five-star restaurant asks its patrons to…

Question

A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal, and the restaurant claims that their satisfaction rating is 80%. Jennie, a food critic, would like to test this. She takes a sample of 150 patrons, and gets a 78.9% sample satisfaction rating.

(a) Create an 98% confidence interval for the restaurant's true satisfaction rating. (Provide answers in decimal form, not percentage. Thus, 77.3% becomes 0.773. Round your answers to four decimal places, if needed.)

( ____ , ____ )

(b) Based on this confidence interval, should Jennie reject the null hypothesis that the satisfaction rating is 80%?

a) Since the interval contains 80%, Jennie should not reject the null hypothesis at a = 0.02.

b) Since the interval does not contain 80%, Jennie should not reject null hypothesis at a = 0.02.

c) Since the interval does not contain 80%, Jennie should reject the null hypothesis at a = 0.02.

d) Since the interval contains 80%, Jennie should reject the null hypothesis at a = 0.02.

Answer 1

Hi Mish L.,

You've asked 7 questions, in great detail, on the same skill set, all at the same time, without evidence you've even thought about the problems? That's spamming. Doing your entire problem set for you is first, forbidden under Wyzant rules, and second, won't help you acquire the skills you need. Ask one question, digest the lesson, and do the rest yourself -- that would be appropriate.

-- Cheers, --Mr. d.