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Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 73.4 Mbps. The complete list of 50 data speeds has a mean of x=16.23 Mbps and a standard deviation of s=18.01 Mbps.

Researchers measured the data speeds for a particular smartphone carrier at 50 airports The highest speed measured was 734 Mbps The complete list of 50 data spe class=

Respuesta :

Part A

The difference is given by

73.4-16.23=57.17 Mbps

Part B

we know that

s=18.01 Mbps

Divide 57.17 Mbps by 18.01 Mbps

so

57.17/18.01=3.17 standard deviations

Part C

The answer must be equal to the number of standard deviations (Part B)

z=3.17

Part D

Remember that

For X=57.17 Mbps -----------> z=3.17

so

For Z between -2 and 2

the answer is significantly low

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