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Again, consider IQ (normally distributed,

/in /by

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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