a.  Fill in the blank. If the standard deviation for a data…

a.  Fill in the blank. If the standard deviation for a data set is 6 inches, the variance is _________ (include unit). b. True or False?  All random samples are simple random samples. c.  Which of the following is more extreme: a height with a z-score of -1.74 or a weight with a z-score of 1.94?  Explain.