We took from a database of a large service company, a random sample of 49 employees at "middle management" level. Employees have been grouped by gender.

Following a discussion with an executive from the human resources department stating that the salary of male executives is higher than that of females, we want to compare the average annual salary according to the gender of the employee.

Using a significance level of 1%, we obtain the following Excel report:

Male Female Mean 41739.0 40838.8 Variance 1011337.778 2675486.16 Observations 28 21 Pooled Variance Hypothesized Mean Difference df t Stat P(T