SOLUTION: PLEASE HELP! I HAVE TWO OTHER QUESTIONS THAT I NEED HELP WITH! IVE ATTEMPTED ALL THREE AND MY PROFESSOR SENT THEM BACK SAYING THAT THEY WERE INCORRECT. PLEASE HELP !!! 2. The sc

Algebra ->  Probability-and-statistics -> SOLUTION: PLEASE HELP! I HAVE TWO OTHER QUESTIONS THAT I NEED HELP WITH! IVE ATTEMPTED ALL THREE AND MY PROFESSOR SENT THEM BACK SAYING THAT THEY WERE INCORRECT. PLEASE HELP !!! 2. The sc      Log On


   



Question 952139: PLEASE HELP! I HAVE TWO OTHER QUESTIONS THAT I NEED HELP WITH! IVE ATTEMPTED ALL THREE AND MY PROFESSOR SENT THEM BACK SAYING THAT THEY WERE INCORRECT. PLEASE HELP !!!
2. The scores on a particular test are normally distributed with mean of 73 and standard deviation 5. What score would a student need to be among the top 10% of all test scores?

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
Find the z-score with a right tail of 10%
invNorm%280.9%29+=+1.2816

Find the corresponding score value:

x+=+z%2As+%2B+u
x+=+1.2816%2A5+%2B+73+=+79.4
Ans: score ->= 79.4