Question
Estimating a Mean: Consider the frequency distribution for 19 test scores (it was a difficult exam)....
Estimating a Mean: Consider the frequency distribution for 19 test scores (it was a difficult exam).
| Score | Frequency |
| 60 − 64 | 8 |
| 65 − 69 | 4 |
| 70 − 74 | 2 |
| 75 − 79 | 4 |
| 80 − 84 | 1 |
(a) The class midpoint for the first class is .
(b) The class midpoint for the second class is .
(c) Use the frequency table to estimate the mean score.
Round your answer to 1 decimal place.
x =
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