Question

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
99
^{th}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?
- If a “normal IQ” is any score between 85 and 115, what proportion of the population has a normal IQ score?
- What proportion of the population has an IQ score that is either lower than 92 or higher than 118?

Show work and explain method please and thank you~ :(

Answer #1

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 and you know the mean and
standard deviation of these scores. Mensa is organization for
people with very high levels of intelligence. Mensa accepts as
members anyone whose IQ score falls in the top 2% of all people.
Your IQ score is 130 and you want to do an analysis to find out if
you are eligible. You would need to do a _____ analysis. (Choose
1)
_____ a. z-score and the normal curve
_____...

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 have a mean of 100 and a standard deviation of 15.
What percentile corresponds to an IQ score of 115? Explain the
steps you took to find the percentile.

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 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...

adults have IQ scores that are normally distributed with a mean of
100 and a standard deviation of 15
a. what IQ score respresents the 95th percentile?
b. what IQ score represents the 50th percentile?
show how you got the answer step by step, clearly just trying
to check my work thanks !

A) IQ is normally distributed with a mean of
100 and a standard deviation of 15
Suppose an individual is chosen at random:
MENSA is an organization whose members have IQs in the top 3%. What
is the minimum IQ you would need to qualify for membership? (round
to nearest whole number)
B) The height of men is a normally distrubuted
variable with a mean of 68 inches and a standard deviation of 3
inches. **Round answers to ONE decimal...

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

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