2. Which of the following BEST illustrates the economic concept of scarcity? A-
Jorge's boss tells him that if he gets the stockroom cleaned up by closing time, he can have the day off
tomorrow.
B-In the winter, the hardware store charges more for snow shovels than it charges in the summer.
C-Marie bought some stock for $1,000 last year, today she sold the stock for $1,250.
D-Dan wants a bag of chips and a cola. Each costs one dollar. Dan has just $1.50

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.