38 - In an exam attended by 400 people, the average of the grades is 45 and the standard deviation is 5.7, showing a normal distribution. 50 samples of n=16 people were taken from this population to the returned lottery. Find the arithmetic mean and standard error of the distribution of the sample means A) 43 and 1,425 B) 45 and 1,425 C) 45 and 2,425 D) 41 and 1.5 E) 55 and 1,425

Q: In order to estimate the average time spent per student on the computer terminals at a local…

A: sample size(n) = 81population standard deviation = 1.5 hoursstandard error for mean = ?

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A:

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A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

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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.