STATISTIC CASE 3 - Frequency Distributions

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ASSIGNMENT #3:

1. To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a specific model. The prices he was quoted are listed below $ 218 $ 125 $ 381 $ 187 $ 231 $ 213 $ 309 $ 230 Find the Standard deviation

2. When investigating times required for drive-through service, the following results (in seconds) were obtained. Find the range, variance, and standard deviation for each of the two samples, then compare the two sets of results. Wendy's 110 113 133 198 124 120 154 110 McDonald's 105 116 131 176 118 110 135 137

3. A company had 74 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. Find the standard deviation of the data summarized in the given frequency distribution. Salary Number of Employees 5,001 -10,000 11 10,001 - 15,000 13 15,001 - 20,000 20 20,001 - 25,000 17 25,001 - 30,000 13

4. The heights of a group of professional basketball players are summarized in the frequency distribution below. Find the standard deviation: Height (in.) Frequency 70-71 4 72-73 9 74-75 18 76-77 11 78-79 9 80-81 4 82-83 1