Review(45a): fill in the blank spaces: when the XXXXXXXXXXstandard deviation is XXXXXXXXXXwe need to calculate the XXXXXXXXXXstandard deviation from the sample data.In this case, we cannot use a...

Review(45a):

fill in the blank spaces:

when the ------------ standard deviation is----------------we need to calculate the -------------standard deviation from the sample data.In this case, we cannot use a-------- but we must use use a ---------

even though it is --------- powerful