A Single Population Mean Using the Normal Distribution · Exercise 22
A sample of 20 heads of lettuce was selected. Assume that the population distribution of head weight is normal. The weight of each head of lettuce was then recorded. The mean weight was 2.2 lb, with a standard deviation of 0.1 lb. The population standard deviation is known to be 0.2 lb.
What would happen if 40 heads of lettuce were sampled instead of 20 and the confidence level remained the same?
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OpenStax, Statistics · §8.1 A Single Population Mean Using the Normal Distribution · Exercise 22
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