Posted by **Alicia** on Monday, June 23, 2008 at 9:37pm.

Intelligence quotients on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Use the 68-95-99.7 rule to find the percentage of people with the following IQs:

a.) between 84 and 100

b.) below 52

- contemporary math -
**bobpursley**, Monday, June 23, 2008 at 9:48pm
a) One standard deviation is 16, that is a score of 84. 68 percent will have a score of 100+-16, so 34 percent will have a score from 84 to 100.

b. How many standard deviations is a score of 52?

- contemporary math -
**Alicia**, Monday, June 23, 2008 at 9:52pm
thank you

The standard devation is the same for b.) as it is for a.)

- contemporary math -
**bobpursley**, Monday, June 23, 2008 at 9:54pm
Yes, of course it is. So how many standard deviations is it to a score of 52?

- contemporary math -
**Alicia**, Monday, June 23, 2008 at 10:55pm
oh ok so 2.

- contemporary math -
**Alicia**, Monday, June 23, 2008 at 11:00pm
I meant 3

so would it be

100-16(3) =52

100-99.7=.03

- contemporary math -
**pat**, Thursday, June 26, 2008 at 1:53pm
where can I learn the basics of contemporary math? I have a hard time figuring this stuff out

- contemporary math -
**Brandon**, Thursday, June 26, 2008 at 6:14pm
What exactly is contemporary math anyway? How does one define it exactly?

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