70 The probability density function of the weight of packages delivered by a post office is f(x) = for 1

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
Section13.1: Continuous Probability Models
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70
The probability density function of the weight of packages delivered by a post office is f(x) =
for 1 <x< 70 pounds.
69x2
a) Determine the mean and variance of weight.
Mean -
pounds (Round the answer to 2 decimal places.)
Variance -
pounds? (Round the answer to 1 decimal place.)
b) If the shipping cost is $2.50 per pound, what is the average shipping cost of a package? $l
c) Determine the probability that the weight of a package exceeds 57 pounds.
(Round the answer to 1 decimal place.)
(Round the answer to 5 decimal places.)
Transcribed Image Text:70 The probability density function of the weight of packages delivered by a post office is f(x) = for 1 <x< 70 pounds. 69x2 a) Determine the mean and variance of weight. Mean - pounds (Round the answer to 2 decimal places.) Variance - pounds? (Round the answer to 1 decimal place.) b) If the shipping cost is $2.50 per pound, what is the average shipping cost of a package? $l c) Determine the probability that the weight of a package exceeds 57 pounds. (Round the answer to 1 decimal place.) (Round the answer to 5 decimal places.)
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