The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal, with mean 266 days and standard deviation 16 days. A study enrolls a random sample of 16 pregnant women. a) What are the mean and standard deviation of the sampling distribution of x̄? b) What is the probability that the average pregnancy length exceeds 270 days?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.