Again, consider IQ (normally distributed, mean = 100, standard deviation =15).

Again, consider IQ (normally distributed, mean = 100, standard deviation =15).
a) 20% of all IQ’s are above what value? 20% are below what value? b) for a sample of size 40, 20% of all sample average IQ’s are above what value? 20% of all sample average IQ’s are below what value?

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