Homework:HW 8

Question 2, 3.3.5

Part 1 of 4

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Part 1

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was

75.9

Mbps. The complete list of 50 data speeds has a mean of

x=18.33

Mbps and a standard deviation of

s=33.21

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

2

and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant?