Question

A) 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 90 and 120. (Provide graphing calculator sequence)

B) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard of 15. Find P3D, which is the IQ score separating the bottom 30% from the top 70%. (Provide graphing calculator sequence)

Answer #1

Assume that adults have IQ scores that are normally distributed
with a mean 105 and standard deviation of 20. a. Find the
probability that a randomly selected adult has an IQ less than 120.
b. Find P90 , which is the IQ score separating the bottom 90% from
the top 10%. show work

Assume that adults have IQ scores that are normally distributed
with a mean of 100 and a standard deviation of 15. For a randomly
selected adult, find the probability. Round scores to nearest whole
number.
1.) Prob. of IQ less than 85
2.)Prob. of IQ greater than 70
3.) Prob. of randomly selected adult having IQ between 90 and
110.

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 100 and a standard deviation of 15. Find the
probability that a randomly selected adult has an IQ between 84 and
116.

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.)

Assume that adults have IQ scores that are normally distributed
with a mean of 95.7 and a standard deviation 21.7. Find the first
quartile Upper Q 1, 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 101.2 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?

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