To investigate the relationship between mean job tenure in years among workers who have a bachelor’s degree or higher and those who do not, random samples of each type of worker were taken, with the...

To investigate the relationship between mean job tenure in years among workers who have a bachelor’s degree or higher and those who do not, random samples of each type of worker were taken, with the results as shown in Table 2.

Table 2

Test, at the 1% level of significance, the claim that mean job tenure among those with a bachelor’s degree or higher is greater than among those without, against the default that there is no difference in the means.