Paul schumer and jim miller, two analysts at a research institute, discuss the rising costs of higher education in their country. paul feels that escalating tuition fees in colleges and universities are indicative of a bubble in the higher education market. according to jim, however, the rising costs are the result of better quality education being provided by the institutions in recent years. which of the following, if true, will strengthen jim's claim
a. the gap between the earnings of college graduates and nongraduates is increasing.
b. the demand for student loans has fallen in the last few years.
c. students in most colleges complain of bad infrastructure.
d. salary levels in the education sector have remained more or less unchanged over the last few years.

Rate of return, standard deviation, coefficient of variation personal finance problem mike is searching for a stock to include in his current stock portfolio. he is interested in hi-tech inc.; he has been impressed with the company's computer products and believes hi-tech is an innovative market player. however, mike realizes that any time you consider a technology stock, risk is a major concern. the rule he follows is to include only securities with a coefficient of variation of returns below 1.07. mike has obtained the following price information for the period 2015 through 2018:hi-tech stock, being growth-oriented, did not pay any dividends during these 4 years. a. calculate the rate of return for each year, 2015 through 2018, for hi-tech stock. b. assume that each year's return is equally probable and calculate the average return over this time period. c. calculate the standard deviation of returns over the past 4 years. (hint: treat this data as a sample.) d. based on b and c determine the coefficient of variation of returns for the security. e. given the calculation in d what should be mike's decision regarding the inclusion of hi-tech stock in his portfolio?