Posted by sha on .
please help! i know exactly how to find the mean but i am having a problem finding the midpoints. couldn't get them right :(
salary employees
5,001 10,000 == 16
10,00115,000 == 15
1500120,000 == 11
20,00125,000 == 15
25,00130,000 == 23

stats:find the mean 
drwls,
If you want the mean salary, you can only get an approximate value since you only have histogram data (the number per salary interval). Assume that the number 16 applies to a salary at the midpioit of the first interval ($7500), etc.
The mean will be
(16*7500 + 15*12500 + 11*(17,500) + 15*22500 + 23*27,500)/(16+15+11+15+23) = $18,375 
stats:find the mean 
Anonymous,
thanks a bunch!! =D