Suppose x has a distribution with μ = 21 and σ = 20. (a) If a random sample of size n = 49 is drawn, find μx, σ x and P(21 ≤ x ≤ 23). (Round σx to two decimal places and the probability to four decimal places.) μx =  σ x =  P(21 ≤ x ≤ 23) =  (b) If a random sample of size n = 55 is drawn, find μx, σ x and P(21 ≤ x ≤ 23). (Round σ x to two decimal places and the probability to four decimal places.) μx =  σ x =  P(21 ≤ x ≤ 23) =

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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.