Question

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

Answer #1

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...

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
between 91 and 119.

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.

1. Assume that adults have IQ scores that are normally
distributed with a mean of 104.3 and a standard deviation of 23.8.
Find the probability that a randomly selected adult has an IQ
greater than 147.0. The probability that a randomly selected adult
from this group has an IQ greater than 147.0 is..
2. Engineers want to design seats in commercial aircraft so that
they are wide enough to fit 90% of all males. (Accommodating 100%
of males would require...

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%.

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

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