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Test 3
2.
Suppose the monthly charges for cell phone plans are normally distributed with mean ì=$57 and standard deviation ó=$16.
(a) Draw a normal curve with the parameters labeled.
(b) Shade the region that represents the proportion of plans that charge less than $41.
(c) Suppose the area under the normal curve to the left of X=$41 is 0.1587. Provide an interpretation of this result.
(c) Select the correct choice below and fill in the answer box to complete your choice. (Type a whole number.)
A. The probability is 0.1587 that a randomly selected cell phone plan in this population is less than
B. The probability is 0.1587 that a randomly selected cell phone plan in this population is more than