Shawna wants to ensure that she has a good income throughout her retirement. which method could she employ? she could work fewer hours each week so she will stay strong and retire later. she could start a 401k account and choose a position with matching deposits by the employer. she could save money by not attending post-secondary school or vocational training. she could ensure that she doesn’t get sick by taking her vitamins each day.

Alarge university wanted to study the relationship between completing an internship during college and students' future earning potential. prom the same graduating class, they selected a random sample of 80 students who completed an internship and 100 students who did not complete an internship and examined their salaries five years after graduation. they found that there was a statistically higher mean salary for the internship group than for the noninternship group. which of the following interpretations is the most appropriate? a. there could be a confounding variable, such as student major, that explains the difference in mean salary between the internship and no internship groups.b. we cannot infer anything from these data since the distribution of salaries is likely right skewed.c. you cannot draw any valid conclusions because the sample sizes are different.d. more students should complete internships because having an internship produces a higher salary.