Homework ch 8-9

Q2.1: the sample mean is 5,502.76

Q2.2: p-value is 0

Q2.3: Since the p-value is less than 0.05, we reject the null hypothesis.

Q3.1: .051

Q3.2: 0

Q3.3: Yes, there is sufficient statistical evidence at the 5% level, so the HR director should be concerned because the results are unlikely to be due to random chance.

HO: departments and attribution are independent

Ha: departments and Attrition are not independent

Research & Development

Degrees of Freedom: 2

Chi-Square Statistics: 10.338405346935614

p-value: 0.006

We reject the null hypothesis.

Attrition is not evenly distribution