SOLUTION: A SET OF SCORES WITH A MEAN OF 16 AND A STANDARD DEVIATION OF 3. WHAT SCORE SEPARATES THE TOP 30 PERCENT OF THE POPULATION FROM THE LOWER 70 PERCENT?

Algebra ->  Probability-and-statistics -> SOLUTION: A SET OF SCORES WITH A MEAN OF 16 AND A STANDARD DEVIATION OF 3. WHAT SCORE SEPARATES THE TOP 30 PERCENT OF THE POPULATION FROM THE LOWER 70 PERCENT?      Log On


   

Question 355232: A SET OF SCORES WITH A MEAN OF 16 AND A STANDARD DEVIATION OF 3. WHAT SCORE SEPARATES THE TOP 30 PERCENT OF THE POPULATION FROM THE LOWER 70 PERCENT?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the z-score that give P%28z%29=0.7.
Using EXCEL's NORMSINV function, z=0.524401%7D%7D%0D%0A.%0D%0A.%0D%0A.%0D%0A%7B%7B%7B%28x-mu%29%2Fsigma=0.524401
%28x-16%29%2F3=0.524401
x-16=1.573
highlight%28x=17.573%29