SOLUTION: A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70 peaches per tree. A scientist wishes to find the 80
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Question 953463: A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70 peaches per tree. A scientist wishes to find the 80% 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 10 peaches per tree? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70 peaches per tree. A scientist wishes to find the 80% 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 10 peaches per tree?
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Since ME = z*s/sqrt(n),
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n = [z*s/E]^2
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Your Problem::
n = [1.2816*70/10]^2 = 81 when rounded up
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Cheers,
Stan H.
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