MK 332 Homework April 1, 2020
Q2. A company wants to know how long newlyhired MBAs remain on their first jobs. A sample of 17 MBAs has anaverage of 3 years, with a standard deviation of 2. Create aConfidence Interval with Confidence level of 95%. Interpret.
Q1. A Pizza Hut store manager believes that theaverage number of customers who return a pizza or ask for a refundis 20 per day. The store records the number of returns andexchanges for the 25 days it was open during a given month. Are thereturns different than 20 per day?
Sample mean= 25, s=5, n=25. Test at α = .01.
H0: µ = 20
H1: µ ≠20
Test by both methods, interpret and conclude.
