Question

IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15.

a) Find the IQ scores that represent the bottom 35%

. b) Find the IQ score that represents the 3rd Quartile

c) Find the IQ score for the top 5%

Answer #1

Hope this will help you. Thank you :)

IQ
scores are normally distributed with a mean of 100 and standard
deviation 15. what is the IQ score for an area of 0.9918

Assume that adults have IQ scores that
are normally distributed with a mean of 100 and a standard
deviation of 15. Find the probability that a randomly selected
adult has an IQ between 115 and 130.
(a)
.6700 (b)
.1359 (c)
.9082 (d)
.1596 (e) .1628
5 Refer to question 4
above. Find the IQ score at Q1 or the 25th percentile.
This is the score which separates the bottom 25% from the top
75%.
(a)
89.95 (b)...

Assume that adults have IQ scores that are normally distributed
with a mean of 96.3 and a standard deviation 23.1 Find the first
quartile , which is the IQ score separating the bottom 25% from
the top 75%. (Hint: Draw a graph.)

Assume that adults have IQ scores that are normally distributed
with a mean of 101 and a standard deviation 24. Find the first
quartile Upper Q 1, which is the IQ score separating the bottom
25% from the top 75%.

Assume that adults have IQ scores that are normally distributed
with a mean of 101.2 and a standard deviation 23.6 Find the first
quartile Upper Q 1Q1, which is the IQ score separating the bottom
25% from the top 75%. (Hint: Draw a graph.) The first quartile
is

Assume that adults have IQ scores that are normally distributed
with a mean of
102.7
and a standard deviation
20.9
Find the first quartile
Upper Q 1
which is the IQ score separating the bottom 25% from the top
75%. (Hint: Draw a graph.)
The first quartile is?

Assume that adults have IQ scores that are normally distributed
with a mean of 103.9 and a standard deviation 24.9. Find the first
quartile Upper Q 1, which is the IQ score separating the bottom
25% from the top 75%. (Hint: Draw a graph.) The first
quartile

Assume that adults have IQ scores that are normally distributed
with a mean of 96.2 and a standard deviation 19.2. Find the first
quartile Upper Q 1, which is the IQ score separating the bottom
25% from the top 75%. (Hint: Draw a graph.)

adults have IQ scores that are normally distributed with a mean of
100 and a standard deviation of 15
a. what IQ score respresents the 95th percentile?
b. what IQ score represents the 50th percentile?
show how you got the answer step by step, clearly just trying
to check my work thanks !

Adults have a IQ scores that are normally distributed with a
mean of a 100 and a standard deviation of 15.
a) what percentage of scores are less than 103?
b) what percentage of scores are between 60 and 130?
c) what is the IQ score seperating the bottom 25% from the
rest?
thank you.

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