Question

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

a. Find the probability that a randomly selected person has an IQ less than 115.

b. Find the probability that a randomly selected person has an IQ above 60.

c. Find the 80th percentile for IQ scores.

d. Find the probability that 20 randomly selected person has an IQ less than 110.

e. What percentage of people have IQ scores between 60 and 85?

Answer #1

For the following, consider that IQ scores are normally
distributed with a mean of 100 and a standard deviation of 15.
Find the probability that a person has an IQ below 60
Find the probability that a randomly selected person has an IQ
between 60 and 85
Find the probability that a randomly selected person has an IQ
above 118.
Find the IQ score that cuts off the lower 25% of the population
from the upper 75%.
Find the probability...

IQ scores are normally distributed with a mean of 110 and a
standard deviation of 16. Find the probability a randomly selected
person has an IQ score greater than 115.

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.

13. Adult IQ scores are normally distributed with a mean of 100
and a standard deviation of 15. Find the probability that a
randomly chosen adult has an IQ between 70 and 115.

IQ is normally distributed with a mean of 100 and a standard
deviation of 15.
a) Suppose one individual is randomly chosen. Find the
probability that this person has an IQ greater than 95. Write your
answer in percent form. Round to the nearest tenth of a percent.
P(IQ greater than 95) =
b) Suppose one individual is randomly chosen. Find the
probability that this person has an IQ less than 125. Write your
answer in percent form. Round to...

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

1. IQ tests are normally distributed with a mean of 100 and a
standard deviation of 15. Find the following probabilities:
A) If a person is randomly selected, what is the probability
that the person had an IQ greater than125? _________________
b) If a person is randomly selected what is the probability that
the person has an IQ below 92?
c) If 40 people are randomly selected, what is the probability
that their mean IQ is between 98 and 108?

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:

IQ scores are normally distributed
with mean of 100 and a standard deviation of 15.
If MENSA only accepts people with an IQ score at the
99th percentile or higher, what is the lowest possible
IQ score you can have and still be admitted to the
organization?
Mental disability has traditionally been diagnosed for anyone
with an IQ of 70 or lower. By this standard, what proportion of the
population would meet criteria to be diagnosed with a mental
disability?...

According to an article in American Scientist, IQ scores are
normally distributed with a mean of 100 and a standard deviation of
15. Find the following probabilities:
a) The probability that a randomly selected person has an IQ
score of at least 111.
b) The probability that a randomly selected person has an IQ of
less than 96.
c) The probability that a randomly selected person has an IQ
score between 119 and 145.
(Please show all work.)

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 6 minutes ago

asked 6 minutes ago

asked 12 minutes ago

asked 20 minutes ago

asked 39 minutes ago

asked 41 minutes ago

asked 48 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago