The following are heights (in inches) of randomly selected women: 63.7, 61.2, 66.0, 62.5, 65.7, 64.4,...
The following are heights (in inches) of randomly selected women:
63.7, 61.2, 66.0, 62.5, 65.7, 64.4, 63.0, 61.9
- Find the best point estimate of the population variance σ².
- Construct a 95% confidence interval estimate of the population standard deviation σ.
- Does the confidence interval contain the standard deviation value of 2.5 inches? (Women’s heights are known to have a standard deviation of 2.5 inches).
PLEASE WRITE CLEARLY. PLEASE SHOW STEP BY STEP SOLUTION
Homework Answers
explanation for part (a)
mean = 63.55
| data | data-mean | (data - mean)2 |
| 63.7 | 0.15 | 0.0225 |
| 61.2 | -2.35 | 5.5225 |
| 66.0 | 2.45 | 6.0025 |
| 62.5 | -1.05 | 1.1025 |
| 65.7 | 2.15 | 4.6225 |
| 64.4 | 0.85 | 0.7225 |
| 63.0 | -0.55 | 0.3025 |
| 61.9 | -1.65 | 2.7225 |
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The following are heights (in inches) of randomly selected
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