The management of Beta Technologies, Inc., is trying to determine the variable that best explains the variation of employee salaries using a sample of 52 full-time employees; see the file P16_11.xlsx. Estimate simple linear regression models to identify which of the following has the strongest linear relationship with annual salary: the employee’s gender, age, number of years of relevant work experience prior to employment at Beta, number of years of employment at Beta, or number of years of post-secondary education.

Provide support for your conclusion.