Researchers measured the data speeds for a particular smartphone carrier at 50 airports. the highest speed measured was 77.577.5 mbps. the complete list of 50 data speeds has a mean of x overbarxequals=17.1517.15 mbps and a standard deviation of sequals=35.8835.88 mbps.
a. what is the difference between carrier's highest data speed and the mean of all 50 data speeds?
b. how many standard deviations is that [the difference found in part (a)]?
c. convert the carrier's highest data speed to a z score.
d. if we consider data speeds that convert to z scores between minus−2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant?