Question
Calculate the sample variance and sample standard deviation for the following frequency distribution of heart rates...
Calculate the sample variance and sample standard deviation for the following frequency distribution of heart rates for a sample of American adults. If necessary, round to one more decimal place than the largest number of decimal places given in the data.
| Class | Frequency |
|---|---|
| 61 - 66 | 12 |
| 67 - 72 | 13 |
| 73 - 78 | 6 |
| 79 - 84 | 14 |
| 85 - 90 | 12 |
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66
67
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78
78
78
79
79
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79
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80
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