A study of peach trees found that the average number of peaches per tree was 625....
A study of peach trees found that the average number of peaches per tree was 625. The standard deviation of the population is 35 peaches per tree. A scientist wishes to find the 99% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to obtain an average accurate to within 18 peaches per tree?
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4 |
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21 |
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23 |
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26 |
Homework Answers
| for 99 % CI value of z= | 2.576 |
| standard deviation σ= | 35 |
| margin of error E = | 18 |
| required sample size n=(zσ/E)2 = | 26.0 |
option 26 is correct
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