Suppose the monthly charges for cell phone plans are normally distributed with mean μ=$62 and standard deviation σ=$18. (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $44. (c) Suppose the area under the normal curve to the left of X=$44 is 0.1587. Provide an interpretation of this result.
Suppose the monthly charges for cell phone plans are normally distributed with mean μ=$62 and standard deviation σ=$18. (a) Draw a normal curve with the parameters labeled. (b) Shade the region that represents the proportion of plans that charge less than $44. (c) Suppose the area under the normal curve to the left of X=$44 is 0.1587. Provide an interpretation of this result.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 7E
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Suppose the monthly charges for cell phone plans are normally distributed with mean
μ=$62
and standard deviation
σ=$18.
(a) Draw a normal curve with the parameters labeled.
(b) Shade the region that represents the proportion of plans that charge
less
than
$44.
(c) Suppose the area under the normal curve to the
left
of
X=$44
is 0.1587. Provide an interpretation of this result.Expert Solution
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