In a certain large population of adults, the distribution of iq scores is strongly left-skewed with a mean of 122 and a standard deviation of 5. suppose 200 adults are randomly selected from this population for a market research study. the distribution of the sample mean of iq scores is:_________.
a) left-skewed with mean 122 and standard deviation 0.35.
b) exactly normal with mean 122 and standard deviation 5.
c) exactly normal with mean 122 and standard deviation 0.35.
d) approximately normal with mean 122 and standard deviation 5.
e) approximately normal with mean 122 and standard deviation 0.35.