Pls help me.........
1 answer:
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Answer:
Step-by-step explanation:
Let X be the IQ
IQ is normally distributed with a mean of 100 and a standard deviation of 15.
a) the probability that this person has an IQ greater than 95
=
=62.93%
b) the probability that this person has an IQ less than 125
=4.75%
c) Sample size =500
No of people = 0.2486(500) =124.3
d)
No of persons = 0.0047(500) = 2.35