The Distribution of Heights of Adult Males Has a Mean

question 67

Short Answer

The distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 adult males is selected.
Is the sampling distribution of the sample mean approximately normal?
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What is the mean?
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What is the standard deviation?
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Find the probability that the average height will be more than 70 inches.
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Find the probability that the average height will be between 67.4 inches and 70.5 inches, inclusively.
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