For a given mean and standard deviation, the _____ function in Excel is used to generate a value for the random variable characterized by a normal distribution.
a. NORM.INV
b. RAND
c. VLOOKUP
d. FREQUENCY
Question 2
When computing the mean of a set of values xi, the value of xi
a. can never be zero
b. can never be negative
c. must always be positive
d. can be any value