Suppose a random sample of 90 measurements is selected from a population with a mean of 35 and a variance of 300. Select the pair that is the mean and standard error of x.
a) [35, 2.125]
b) [35, 1.825]
c) [90, 2.025]
d) [35, 2.325]
e) [35, 2.225]
f) None of the above