The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.6 years. The standard deviation of the distribution is 2.5 years. For a random sample of 63 men, what is the likelihood that the age at which they were married for the first time is less than 24.8 years? (Round z value to 2 decimal places. Round your answer to 4 decimal places.) Probability
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In the United States, the mean age of men when they marry for the first time follows the normal distribution with a mean of 24.6 years. The standard deviation of the distribution is 2.5 years. For a random sample of 62 men, what is the likelihood that the age when they were first married is less than 24.8 years? (Round your z value to 2 decimal places. Round your answer to 4 decimal places.)
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The mean age at which men in the United States marry for the first time is 24.8 years. The shape and the standard deviation of the population are both unknown. For a random sample of 60 men, what is the likelihood that the age at which they were married for the first time is less than 25.1 years? Assume that the standard deviation of the sample is 2.5 years.
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