SOLUTION: MENSA is an international organization requiring a high IQ for membership. To qualify for membership, one needs to have an IQ in the top 2% on some approved intelligence te

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Question 1202482: MENSA is an international organization
requiring a high IQ for membership. To
qualify for membership, one needs to
have an IQ in the top 2% on some
approved intelligence tests. One such test
is the Stanford-Binet Intelligence Scales
(SBIS), which assumes that IQ scores are
normally distributed with a mean of 100
and a standard deviation of 16.
A. Find the proportion of people in the
general population with IQs between 90 to
110.
B. What is the lowest IQ score in the SBIS
that would qualify you for MENSA
membership?
C. Leonor has an IQ score of 150. What
proportion of the general population have IQ
scores above Leonor’s IQ score?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
A. Find the proportion of people in the
general population with IQs between 90 to
110.

proportion is equal to .4680290644.

round to 3 decimal places to get .468.
this matches the calculator results shown below.



B. What is the lowest IQ score in the SBIS
that would qualify you for MENSA
membership?

lowest score is equal to 132.8599826.

round to 2 decimal places to get 132.86.
this matches the calculator results shown below:




C. Leonor has an IQ score of 150. What
proportion of the general population have IQ
scores above Leonor’s IQ score?

propoertion is equal to .0008890925719.

round to 4 decimal places to get .0009.
this matches the calculator results shown below.