Question

1. In a sample of 350 students selected from a large college of business, 25% are found to be marketing majors. The 25% is a statistic.

True                 False

2. Lily has been keeping track of what she spends to eat out. The last week's expenditures for meals eaten out were $5.69, $5.95, $6.19, $10.91, $7.49, $14.53, and $7.66. What is the mean amount Lily spends on meals?

__________________

3. Monthly rent in dollars for a sample of 10 stores in a small town in South Dakota are as follows: 220, 216, 220, 205, 210, 240, 195, 235, 204, and 250. What is the sample mean?

__________________

4. Suppose that a firm's sales were $2,500,000 four years ago, and sales have grown annually by 25%, 15%, -5%, and 10% since that time. What was the geometric mean growth rate in sales over the past four years?

                                                                                                __________________

5. The data set 10, 20, 30 has the same variance as the data set 100, 200, 300.

True                 False

6. The values for a sample taken from a particular population are listed below. Calculate the standard deviation for the sample values.

9     14     18     21

                                                __________________

7. A basketball player has the following points for seven games: 20, 25, 32, 18, 19, 22, and 30. Compute the coefficient of variation.

__________________

8. According to the Empirical Rule, if the data form a bell shaped normal distribution, approximately ________ % of the observations will be contained within two standard deviations.

9. In a bell-shaped distribution, there is no difference in the values of the mean, median, and mode.

True                 False

10.A data sample has a mean of 107, a median of 122, and a mode of 134. The distribution of the data is positively skewed.

True                 False

Answer 1