Question

Assume that adults have IQ scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. Find the probability that a randomly selected adult has an IQ between 85 and 115. The probability that a randomly selected adult has an IQ between 85 and 115 is:

Answer #1

Let "X" be the IQ scores of adults.

Refer Standard normal table/Z-table to find the probability or
use excel formula "**=NORM.S.DIST(0.75, TRUE)**" &
"**=NORM.S.DIST(-0.75, TRUE)**" to find the
probability.

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 100 and a standard deviation sigma equals
20 . Find the probability that a randomly selected adult has an IQ
between 85 and 115 .
The probability that a randomly selected adult has an IQ between
85 and 115 is? .
(Type an integer or decimal rounded to four decimal places as
needed.)

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 105 and a standard deviation sigma equals
20. Find the probability that a randomly selected adult has an IQ
between 91 and 119.

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 105?=105 and a standard deviation sigma
equals 20?=20. Find the probability that a randomly selected adult
has an IQ between 92 and 118.

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 105 and a standard deviation sigma equals
20. Find the probability that a randomly selected adult has an IQ
less than 129. Click to view page 1 of the table. LOADING... Click
to view page 2 of the table. LOADING... The probability that a
randomly selected adult has an IQ less than 129 is nothing. ?(Type
an integer or decimal rounded to four decimal...

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 200 and a standard deviation of 20. Find the
probability that a randomly selected adult has an IQ between 150
and 175.

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.

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...

For question 10, 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
of the following: 10. Find the area under the standard normal curve
for the following: • Less than 115. • Greater than 131.5 • Between
90 and 110 • Between 110 and 120

Assume that adults have IQ scores that are normally distributed
with a mean of 102.9 and a standard deviation of 15.1 Find the
probability that a randomly selected adult has an IQ greater than
119.8

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