Author Question: In the notation below, X is the random variable, c is a constant, and V refers to the variance. ... (Read 55 times)

Alainaaa8 · **on:** Jun 24, 2018

In the notation below, X is the random variable, c is a constant, and V refers to the variance. Which of the following laws of variance is not true?
a. V(c) = 0 c. V(cX) = c2 V(X)
b. V(X + c) = V(X) + c d. None of these choices.

Question 2

A lab at the DeBakey Institute orders 150 rats a week for each of the 52 weeks in the year for experiments that the lab conducts. Suppose the mean cost of rats used in lab experiments turned out to be 20.00 per week. Interpret this value.
a. Most of the weeks resulted in rat costs of 20.00
b. The median cost for the distribution of rat costs is 20.00
c. The expected or average costs for all weekly rat purchases is 20.00
d. The rat cost that occurs more often than any other is 20.00