Which of the following market characteristics would limit competition? competition would be limited if a. consumers have no impact on market price. b. customers are not free to take their business to whomever they choose. c. buyers do not care from which firm they purchase the output. d. new firms entering an industry have to invest in research or product development. e. firms cannot raise the price of their product above that of competitors without losing all sales.

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.