# Lifespan

A lifespan in hours for an electrical component is a random variable x, with cumulative dist. funct.:

F(x) = {1-e^-x/100 for x>0

0 elsewhere

Determine probability function x for x:

Which of the Following Answers:

a.) F(x) = {100e^-x/100 for x>0

0 elsewhere

b.) F(x) = {1-1/100e^-x/100 for x>0

0 elsewhere

c.) F(x) = {1/100e^-x/100 for x>0

0 elsewhere

d.) F(x) = {x/100e^-x/100 for x>0

0 elsewhere

https://brainmass.com/statistics/probability/cumulative-distribution-function-33579

#### Solution Preview

The answer is C

The cumulative distribution function is F(x), ...

#### Solution Summary

A lifespan in hours for an electrical component is a random variable x, with cumulative dist. funct.:

F(x) = {1-e^-x/100 for x>0

0 elsewhere

Determine probability function x for x:

Which of the Following Answers:

a.) F(x) = {100e^-x/100 for x>0

0 elsewhere

b.) F(x) = {1-1/100e^-x/100 for x>0

0 elsewhere

c.) F(x) = {1/100e^-x/100 for x>0

0 elsewhere

d.) F(x) = {x/100e^-x/100 for x>0

0 elsewhere