Homework 8-9

Part 1

Part 2: Questions:

Null hypothesis: Our Monthly income = $6,200

Alternative: Monthly income != $6,200

Question 1: $5,503

Question 2: 0

Question 3: Reject it. "Our employees monthly income is not on track with the industry

standard

Part 6:

Question 1: .171

Question 2: 0

Question 3: Reject it. Our rate is too high to pass this test. It's 5% higher which is somewhat signifianct.

Part 7:

Null: Attrition and department are independent variables

Alt: They are connected

Question 1: Research and Development

Questions 2: Degrees of Freedom (2)

Chi Squared test: 14.2

P value: 0

Question 3: Reject Null, P value is too low