1. A survey of 15 large cities noted the average weekly commute times, in hours, of the residents of each city. The results are recorded in the table below.

4.5	5.0	4.6	5.0	3.6
4.4	5.8	4.9	3.5	4.4
3.7	4.9	3.7	4.7	5.4

Find the mean and sample standard deviation of these data. Round to the nearest hundredth.

mean?

sample standard deviation?

2.A professor grades students on four tests, a term paper, and a final examination. Each test counts as 15% of the course grade. The term paper counts as 20% of the course grade. The final examination counts as 20% of the course grade. Alan has test scores of

80, 76, 82, and 92.

Alan received an 86 on his term paper. His final examination score was 88. Use the weighted mean formula to find Alan's average for the course. (Round your answer to one decimal place.)

3.A stock that pays an annual dividend of $0.52 per share has a current price of $31.00. Find the dividend yield. Round to the nearest hundredth of a percent.

4.You have saved $14,000 for a down payment on a house. Your bank requires a minimum down payment of 11%. What is the maximum price you can offer for a home in order to have enough money for the down payment? (Round your answer to two decimal places.) $

5. A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The results are given in the table below.

514

506

503

498

496

506

457

477

464

514

Find the mean and sample standard deviation of these data. Round to the nearest hundredth.

mean? sample standard deviation?