statistics
posted by Anonymous .
Find the range and the variance (correct to one decimal place). 78,91,93,93,99

range=maxmin=9978=21
sample mean=(78+91+93+93+99)/5=90.8
(7890.8)^2=163.84
(9190.8)^2=0.04
(9390.8)^2=4.84
(9990.8)^2=67.24
sample variance=(163.84+0.04+4.84+4.84+67.24)/4=60.2