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A random sample of 81 observations is drawn from a population with a mean of 104...

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Basic Math

A random sample of 81 observations is drawn from a populationwith a mean of 104 and a variance of 156.25.

a) State the distribution of the sample mean, ??. (Show anyconditions that you have checked.)

b) Calculate the probability that the sample mean is at most102.5.

c) Calculate the probability that the sample mean is between103.5 and 105.8.

Answer & Explanation Solved by verified expert
4.4 Ratings (788 Votes)
Given that mean 104 andvariance 15625 standard deviation sample size n 81a The    See Answer
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