Mathematics, 13.08.2019 12:10 tyme66
a set of tires is designed to last 6 years, with a standard deviation of 2 years. what is the probability that a tire will last less than 4 years?
1%
10%
16%
26%
Answers
Answer from: copperrock15
16%
Step-by-step explanation:
Let the mean of the population of tires denoted by 
and standard deviation as 
.
Given : A set of tires is designed to last 6 years, with a standard deviation of 2 years.
i.e. 
and 
Let x be the random variable that represents the life of tires.
Z-score : 
For x = 4 , we have
Now by using standard normal distribution table we have,
The probability that a tire will last less than 4 years will be :-
Hence, the probability that a tire will last less than 4 years = 16%
Answer from: Quest
$32,660
step-by-step explanation:
Answer from: Quest
The answer of the above is
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