A rectangle and a parallelogram have the same base and the same height. How are their areas related? guys im just asking questi
1 answer:
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Answer:
P(X<118.81)=0.0803
Step-by-step explanation:
Assuming the distribution for the mean life is approximately normal, with mean 120 months and variance 64 months^2, we can calculate the parameters for a sampling distribution with sample size = 89 computers.
The sampling distribution mean will be equal to the mean for a single computer:
The standard deviation will be adjusted by the sample size as:
With these parameters, we can calculate the z-score for X=118.81.
Then, the probability that the mean of a sample of 89 computers is less than 118.81 months is:
Answer:
Step-by-step explanation:
we know that
There are people in Springfield.
of the population of Springfield are under the age of
so
To calculate how many people are under in Springfield
Multiply by