Posted by nicole on Friday, April 16, 2010 at 11:54am.
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $36,000 and a standards deviation of $6000. What is the cutoff salary for teachers in the bottom 10%?
Answer choice:
a. $28,320
b. $43,680
c. $45,870
d. $26,130

math  bobpursley, Friday, April 16, 2010 at 12:09pm
What is your thinking? http://davidmlane.com/hyperstat/z_table.html

math  Reiny, Friday, April 16, 2010 at 12:12pm
Nice
http://www.jiskha.com/display.cgi?id=1271428581

math  nicole, Friday, April 16, 2010 at 12:28pm
ok I got b for the answer is that correct?

math  Damon, Friday, April 16, 2010 at 1:09pm
If it is for the bottom 10% it must be lower than the mean!

math  nicole, Friday, April 16, 2010 at 9:39pm
ok so it will be a?
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