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Quiz 6 Question 5
Quiz 6
5. Suppose the monthly charges for cell phone plans are normally distributed with mean μ=$61 and standard deviation σ=$15.
(a) Draw a normal curve with the parameters labeled.
(b) Shade the region that represents the proportion of plans that charge less than $46.
(c) Suppose the area under the normal curve to the left of X=$46 is 0.1587. Provide an interpretation of this result.
(a) Choose the correct graph below.
(b) Choose the correct graph below.
(c) Select the correct choice below and fill in the answer box to complete your choice. (Type a whole number.)
The probability is 0.1587 that a randomly selected cell phone plan in this population is more than ________ per month
The probability is 0.1587 that a randomly selected cell phone plan in this population is less than _________ per month
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