Question

IQ scores are normally distributed with a mean of 100 and a standard deviation of 16. Assume that many samples of size n are taken from a large population of people and the mean IQ score is computed for each sample. a. If the sample size is n=49, find the mean and standard deviation of the distribution of sample means. The mean of the distribution of sample mean is?

Answer #1

Solution :

Given that,

mean = = 100

standard deviation = = 16

n = 49

The mean of the distribution of sample mean is approximately normal

_{}
=
= 100

_{}
=
/
n = 16 /
49 = 2.2857

IQ scores are normally distributed with a mean of 105 and a
standard deviation of 15. Assume that many samples of size n are
taken from a large population of people and the mean IQ score is
computed for each sample
a. If the sample size is n equals= 64, find the mean and
standard deviation of the distribution of sample
means.
The mean of the distribution of sample means is: 105
The standard deviation of the distribution of sample...

IQ test scores are normally distributed with a mean of 100 and a
standard deviation of 15.
a) Find the IQ scores that represent the bottom 35%
. b) Find the IQ score that represents the 3rd Quartile
c) Find the IQ score for the top 5%

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.

IQ scores are known to be normally distributed with a mean of
100 and a standard deviation of 16.
a. Determine the percentage of students who score between 85 and
120.
b. Determine the percentage of students who score 80 or
greater.
c. Obtain the quartiles, Q1, Q2, and Q3 for the IQ scores, and
show this on a sketch of a normal curve. Include both a z-axis and
an x-axis below the curve.
d. If Mensa only accepts the...

IQ
scores are normally distributed with a mean of 100 and standard
deviation 15. what is the IQ score for an area of 0.9918

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?...

IQ
is normally distributed in the population with a mean of 100 and a
standard deviation of 15. For samples of 25 people, the mean of the
sampling distribution of the mean is ____ and the standard error of
the mean is ____.
(give numeric answers)
I need help with both parts, please and thank you!

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...

IQ
scores are normally distributed with a mean of 100 and a standard
deviation of 15. Determine the 90th percentile for IQ scores

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...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 2 minutes ago

asked 8 minutes ago

asked 8 minutes ago

asked 12 minutes ago

asked 17 minutes ago

asked 17 minutes ago

asked 17 minutes ago

asked 19 minutes ago

asked 36 minutes ago

asked 38 minutes ago

asked 40 minutes ago