a large corporation manufactures laptop computers that last an average 49 months with a standard deviation...

a large corporation manufactures laptop computers that last an average 49 months with a standard deviation of 11 months. A random sample of 75 laptops computers is selected

1-describe the sampling distribution of the average lifetime of laptop computersfor the sample of 75 computers

2-what is the probability that the mean lifetime of the sample of 75 laptop computers exceeds 50 months?

3-what is the value of the sample mean lifetime such that only 3% of the sample means fall below this value?

Solutions

Expert Solution

2) P(X-bar >50)=0.21564

3) mean lifetime is 46.61 such that only 3% of sample mean fall below this value

Solution file is attached go through it

Thanks

orchestra answered 1 year ago

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