Expected Value and Standard Deviation for a Sample Mean Remember the imagpop data frame in the tigerstats package. Here is some information on the heights for this population: ## min Q1 median Q3 max...






Expected Value and Standard Deviation for a Sample Mean


Remember the imagpop data frame in the tigerstats package. Here is some information on the heights for this population:


##   min   Q1 median   Q3  max  mean    sd     n missing
##  53.8 64.7   67.5 70.3 80.2 67.53 3.907 10000       0


As you can see, the mean height mu is 67.53 inches, and the standard deviation sigma is 3.907 inches.


George is about to take a simple random sample of 25 people from this population. He will then compute the sample mean x-bar of the 25 heights. Compute the expected value and the standard deviation of x-bar, and choose all correct options below.




Group of answer choices



(  ) George's sample mean should turn out to be about 67.53 inches, give or take 0.78 inches or so.





(  ) The expected value of  x-bar is 67.53 inches, and the standard deviation of x-bar is about 3.907 inches.





(  ) The expected value of  x-bar is 67.53 inches, and the standard deviation of  is about 0.78 inches.





(  ) George's sample mean should turn out to be about 67.53 inches, give or take 3.907 inches or so.











Jun 02, 2022
SOLUTION.PDF

Get Answer To This Question

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here