The average lifespan of XYZ's phones is 6 years. Each phone lifespan is exponentially distributed. a. Find the rate parameter. b. Graph the probability density function. c. How likely is it that a cellphone will fail in 4 years? d. How long will a cellphone last more than 11 years? e. How likely is it that the cellphone will endure 5-8 years?

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.CR: Chapter 13 Review
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Please answer letters c. d. and e. only.
The average lifespan of XYZ's phones is 6
years. Each phone lifespan is exponentially
distributed.
a. Find the rate parameter.
b. Graph the probability density function.
c. How likely is it that a cellphone will fail in
4 years?
d. How long will a cellphone last more than
11 years?
e. How likely is it that the cellphone will
endure 5-8 years?
Transcribed Image Text:The average lifespan of XYZ's phones is 6 years. Each phone lifespan is exponentially distributed. a. Find the rate parameter. b. Graph the probability density function. c. How likely is it that a cellphone will fail in 4 years? d. How long will a cellphone last more than 11 years? e. How likely is it that the cellphone will endure 5-8 years?
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