The times (in minutes) required by a sample of 15 students to complete a class assignment are as follows: 45, 42, 56, 54, 40, 37, 39, 45, 49, 43, 45, 50, 49, 55, 59. What is the sample variance?

In a small group, members have taken on the task roles of information giver, critic/analyzer, and recorder, and the maintenance roles of gatekeeper and follower. they need to fulfill one more role. which of the following would be most effective for their group dynamics? a dominator b coordinator c opinion seeker d harmonizer

At the end of year 2, retained earnings for the baker company was $3,550. revenue earned by the company in year 2 was $3,800, expenses paid during the period were $2,000, and dividends paid during the period were $1,400. based on this information alone, retained earnings at the beginning of year 2 was:

Consider a treasury bill with a rate of return of 5% and the following risky securities: security a: e(r) = .15; variance = .0400 security b: e(r) = .10; variance = .0225 security c: e(r) = .12; variance = .1000 security d: e(r) = .13; variance = .0625 the investor must develop a complete portfolio by combining the risk-free asset with one of the securities mentioned above. the security the investor should choose as part of her complete portfolio to achieve the best cal would be a. security a b. security b c. security c d. security d