# Midrange, first quartile, mean, standard deviation

Sixteen retail outlets were surveyed to find the cost of a window chiller. The results are 280,310,265,298,285,325,360,340,260,275,295,280,355,295 and 355.

find the midrange

find the value corresponding to P50

find the first quartile (in dollars)

find the mean

find the unbiased standard deviation

what is th z-score, correct to the nearest hundredth, of the data entry 260

https://brainmass.com/statistics/standard-deviation/midrange-first-quartile-mean-standard-deviation-15683

$2.19