1) According to one study, brain weights of men are normally distributed with a mean of 1.10 kg and a standard deviation of 0.14 kg. Use the data to answer questions (a) through (e).
a. Determine the sampling distribution of the sample mean for samples of size 3.
b. Determine the sampling distribution of the sample mean for samples of size 12.
d. Determine the percentage of all samples of three men that have mean brain weights within 0.1 kg of the population mean brain weight of 1.10 kg.
e. Determine the percentage of all samples of twelve men that have mean brain weights within 0.1 kg of the population mean brain weight of 1.10 kg.
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2) According to a study, brain weights of men in country A are normally distributed with mean 1.60 kg and standard deviation 0.12 kg. Apply the 68.26-95.44-99.74 rule to fill in the blanks.
68.26% of men in country A have brain weights between ___ kg and __kg
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