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Question
A random sample of nine telephone calls in an office provided the following information.| Call Number | Duration ( Minutes) | Type of Call |
| 1 | 3 | local |
| 2 | 8 | long distance |
| 3 | 4 | local |
| 4 | 3 | local |
| 5 | 5 | long distance |
| 6 | 6 | local |
| 7 | 3 | local |
| 8 | 5 | local |
| 9 | 8 | local |
a. Determine the point estimate for the average duration of all calls.
b. What is the point estimate for the standard deviation of the population?
c. What is the point estimate for the proportion of all calls that were long distance?
Answer
This answer is hidden. It contains 16 characters.
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