To estimate a population mean, the sample size needed to provide a margin of error of 2 or less with a .95 probability when the population standard deviation equals 11 is _____.
a. 10
b. 11
c. 116
d. 117
Question 2
A property of the exponential distribution is that the mean equals the _____.
a. mode
b. median
c. variance
d. standard deviation