How Do I Solve This On Excel? X Is Distributed As A Normal Random Variable With Mean Of 100 And A Standard Deviation Of 10 (i.e X~N(100,10). You Take A Random Sample Of 30 Items From X And You Calculate The Average Of This Sample. Of Course, Someone Else Could Take A Random Sample Of 30 Items, Calculate The Average, And Get A Slightly Different Number. The Sample Average, Then, Is Itself A Random Variable With Its Own Mean (of 100) And Standard Deviation. What Is The Standard Deviation Of The Sample Averages?

How do I solve this on excel? X is distributed as a Normal random variable with mean of 100 and a standard deviation of 10 (i.e X~N(100,10). You take a random sample of 30 items from X and you calculate the average of this sample. Of course, someone else could take a random sample of 30 items, calculate the average, and get a slightly different number. The sample average, then, is itself a random variable with its own mean (of 100) and standard deviation. What is the standard deviation of the sample averages?

- November 14, 2022 - Edwin Tunner

How do I solve this on excel?

X is distributed as a Normal random variable with mean of 100 and a standard deviation of 10 (i.e X~N(100,10). You take a random sample of 30 items from X and you calculate the average of this sample. Of course, someone else could take a random sample of 30 items, calculate the average, and get a slightly different number. The sample average, then, is itself a random variable with its own mean (of 100) and standard deviation. What is the standard deviation of the sample averages?

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