Mathematics, 02.03.2020 18:52 marieb39

A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and a standard deviation of 9. A second random sample of size n2 = 8 is taken from another normal population with mean 69 and standard deviation 10. Let X1 and X 2 be the two sample means. Find:

a. The probability that X1 - X2 exceeds 4.
b. The probability that 4.3 <= X1 - X2 <= 5.0.

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A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and a standar...