1. Question: Suppose the germination periods, in days, for grass seed are normally distributed. If the population standard deviation is 3 days, what minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean?
2. Question: The length, in words...
1. Suppose the germination periods, in days, for grass seed are normally distributed. If the
population standard deviation is 3 days, what minimum sample size is needed to be 90%
confident that the sample mean is within 1 day of the true population mean?
25 seeds
2. The length, in words, of the essays written for a contest are normally distributed with a
population standard deviation of 442 words and an unknown population mean. If a random
sample of 24 essays is taken and results in a sample mean of 1330 words, find a 99%
3. The lengths, in inches, of adult corn snakes are normally distributed with
a population standard deviation of 8 inches and an unknown population
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