1. Heather has a very important exam to take in the morning. Since she wants to be sure that she will wake up in time, she sets
1 answer:
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Answer:
a)
b)
Step-by-step explanation:
Given:
The lifetimes of the individual items are independent exponential random variables.
Mean = 200 hours.
Assume, Ti be the time between ( )st and the
failures. Then, the
are independent with
being exponential with rate
Therefore,
a)
The variance is given by,
Answer:
0
Step-by-step explanation:
We have the two functions:
And we want to find (f-g)(144).
This is the same thing to f(144)-g(144).
So, let’s determine the value of f(144) and g(144) first:
And:
Hence:
Our final answer is 0.