Question Help ▼ Suppose the monthly charges for cell phone plans are normally distributed with mean u= $57 and standard deviation o= $17. (a) Draw a normal curve with the parameters labeled. (b) Shade...

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Extracted text: Question Help ▼ Suppose the monthly charges for cell phone plans are normally distributed with mean u= $57 and standard deviation o= $17. (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $40. (c) Suppose the area under the normal curve to the left of X = $40 is 0.1587, Provide an interpretation of this result. (a) Choose the correct graph below. OA. OB. Oc. OD. 23 40 57 23 57 91 40 57 74 57 74. 91 Click to select your answer and then click Check Answer.