HR_​Hypothesis_​Testing

Part 2 Answers:

The Null Hypothesis is $6,200. There was no significant difference in the data.

A2.1: The sample mean is $5,502.76

A2.2: p-value is 0

A2.3: I reject the null hypothesis because the p-value is equal to 0.

Answer for Part 3:

The null hypothesis is 12%. There is no significant difference.

A3.1: The mean difference is 1.

A3.2: The p-value is 0.

A3.3: We reject the null hypothesis. The HR director should not be worried.

Answer for Part 4:

There is no significant difference in the data.

A4.1: Research & Development had the highest raw count.

A4.2: The Chi-Square test statistic is 0. The degrees of freedom is 2. The p-value is 0.

A4.3: We reject the null hypothesis. This means that departments and attrition do not need to make significant changes.