1.) A random sample of size 25 is to be taken from a population that is normally distributed with mean 60 and standard deviation 10. The averageof the observations in our sample is to be computed. The sampling distribution ofis

A.normal with mean 60 and standard deviation 10.

B.normal with mean 12 and standard deviation 2.

C.normal with mean 60 and standard deviation 0.4.

D.normal with mean 60 and standard deviation 2.

2.)

You select an employee at random from all those in a large company. An employee can be either male or female, and can be under 30 years old. between 30 and 45 years old. or over 45 years old. The table below gives the probability of each of the six possible age and gender combinations for a randomly selected employee. Under30 30-45 Over45 Under30 3045 Over45 Age gender Male Male Male Female Female Female combination Probability .3 .3 ? .1 .1 .1 Reference: Ref 4-1 The probability that the employee selected is a male over 45 is C\"; A. .3. C\"; B. impossible to determine from the information given. C'; c. .1. C\" D..2