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## Suppose the monthly charges for cell phone plans are normally distributed with mean mu equals $69 and standard deviation sigma

Suppose the monthly charges for cell phone plans are normally distributed with mean mu equals $69 and standard deviation sigma

equals $17.

(a) Draw a normal curve with the parameters labeled.

(b) Shade the region that represents the proportion of plans that charge less than $52.

(c) Suppose the area under the normal curve to the left of Xequals

$52 is 0.1587. Provide an interpretation of this result.

a. Choose the correct graph below.