227k views
16 votes
HELP PLEASE PLEASE DUE TONIGHT !! Scores on the Wechsler Adult intelligence Scale (a Standard IQ test) for certain age group are

normally distributed with mean = 100 and standard deviation o = 15. (Find the Z scorels for
each question first, and then use Table A-2 at the back of your book to find the following
probabilities)
a What percent of IQ scores are less than 122?
(4 points)
b What is the probability that a randomly selected adult in this age group has an IQ
score higher than 147? Is this a significant/unusual event? Explain? (5
points)
C
What percent of adults in this age group have IQs between 85 and 100? Is this
I significant/unusual event? Explain?
(5
points)
Tch
3
O
<
w

HELP PLEASE PLEASE DUE TONIGHT !! Scores on the Wechsler Adult intelligence Scale-example-1
User Qubeuc
by
6.7k points

1 Answer

12 votes
I think the anwser is c
User Lee Irvine
by
7.1k points