Posted by Alicia on .
Intelligence quotients on the StanfordBinet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Use the 689599.7 rule to find the percentage of people with the following IQs:
a.) between 84 and 100
b.) below 52

contemporary math 
bobpursley,
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,
thank you
The standard devation is the same for b.) as it is for a.) 
contemporary math 
bobpursley,
Yes, of course it is. So how many standard deviations is it to a score of 52?

contemporary math 
Alicia,
oh ok so 2.

contemporary math 
Alicia,
I meant 3
so would it be
10016(3) =52
10099.7=.03 
contemporary math 
pat,
where can I learn the basics of contemporary math? I have a hard time figuring this stuff out

contemporary math 
Brandon,
What exactly is contemporary math anyway? How does one define it exactly?