Mitsubishi which operates and manages car rentals for DMMMSU employees found that the tire lifetime for their vehicles has a mean of 50,000 kilometers and standard deviation of 3500 kilometer. a. What...

Mitsubishi which operates and manages car rentals for DMMMSU employees found that the tire lifetime for their vehicles has a mean of 50,000 kilometers and standard deviation of 3500 kilometer. a. What would be the mean and standard error of the tire lifetime of a random sample of 50 vehicles?  A population has a mean of 50 and a standard deviation of 6. (a) What are the mean and standard deviation of the sampling distribution of the mean for N=16? (b)
What are the mean and standard deviation of the sampling distribution of the mean for N=20?

(A2) if the standard error of the mean is 10 for N=12, what is the standard error of the mean for N=22 (B2) if the standard error of the mean is 50 for N=25, what is it for N=64?






A2 and B2 only thank you