The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title....

The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title. There were three job categories: clerical, custodial, and managerial. The study collected current salary data of the three groups and the researcher conducted a statistic and the results are presented below.

Using the five steps of hypothesis testing, explain what the researcher might have done, including the appropriate analysis, and interpret the results.

Average Salary

Clerical (n = 363)    $27,838.54

Custodial (n = 27)   $30,938.89

Manager (n = 84)     $63,977.80

Test statistic = 434.48, p< .05

What would be the null and alternative hypotheses?