Textbook ExpertVerified Tutor
17 Nov 2021
Given information
Use the following information to answer the next three exercises. The average lifetime of a certain new cell phone is three years. The manufacturer will replace any cell phone failing within two years of the date of purchase. The lifetime of these cell phones is known to follow an exponential
distribution.
Step-by-step explanation
Step 1.
It is deduced from the information given in the problem that
The graph can be drawn as below,
The cumulative distributive function of the exponential distribution is given by,
Therefore, the probability is given by .
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