Question

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

Answer #1

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 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

6. Assume that adults have IQ scores that are normally
distributed with mean 100 and standard deviation 15. In each case,
draw the graph (optional), then find the probability of the given
scores. ROUND YOUR ANSWERS TO 4 DECIMAL PLACES
a. Find the probability of selecting a subject whose score is
less than 115. __________
b. Find the probability of selecting a subject whose score is
greater than 131.5. __________
c. Find the probability of selecting a subject whose score...

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:

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 103.3 and a standard deviation of 16.2. Find the
probability that a randomly selected adult has an IQ greater than
127.4. (Hint: Draw a graph.) The probability that a randomly
selected adult from this group has an IQ greater than 127.4 is

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 102.9 and a standard deviation of 15.1 Find the
probability that a randomly selected adult has an IQ greater than
119.8

Assume that adults have IQ scores that are normally distributed
with a mean of 104.1 and a standard deviation of 23.6 Find the
probability that a randomly selected adult has an IQ greater than
144.3

Assume that adults have IQ scores that are normally distributed
with a mean of 99.9 and a standard deviation of 15.5. Find the
probability that a randomly selected adult has an IQ greater than
125.3. (Hint: Draw a graph.)
The probability that a randomly selected adult from this group has
an IQ greater than 125.3 is
nothing.
(Round to four decimal places as needed.)

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