Silicon Valley Company purchased a van at a cost of $42,000 and expects it can be sold for $6,000 after 120,000 miles of service. Assuming the units-of-production method is used and the van is driven for 24,000 miles during the first year, the depreciation at the end of the first year would be

a. $4,200.
b. $1,200.
c. $12,000.
d. $7,200.
e. None of these answers are correct.

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.