Suppose the monthly charges for cell phone plans are normally distributed with mean mu equals $ 70 and standard deviation sigmaequals$16. (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $54. (c) Suppose the area under the normal curve to the left of Xequals$54 is 0.1587. Provide an interpretation of this result.

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mtosi17 mtosi17 · Answer 1 · 2020-05-10T06:23:14+02:00

Answer:

a) The picture with the normal distribution is attached.

b) The picture with the normal distribution with the region X<54 shaded is attached.

c) The area under the normal curve to the left of X=$54 is 0.1587.

This means that there is a probability P=0.1587 that a randomly picked monthly charge for a cell phone plan is under $54.

It can also be interpreted that approximately 15.87% of the cell phone plans have a monthly charge that is less than $54.

Step-by-step explanation:

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