SOLUTION: On a 40- point test, the mean is 23, and the standard deviation is 6.6 . The teacher says that anyone whose score is lower than one standard deviation below the mean will fail the

Algebra ->  Probability-and-statistics -> SOLUTION: On a 40- point test, the mean is 23, and the standard deviation is 6.6 . The teacher says that anyone whose score is lower than one standard deviation below the mean will fail the       Log On


   

Question 1175484: On a 40- point test, the mean is 23, and the standard deviation is 6.6 . The teacher says that anyone whose score is lower than one standard deviation below the mean will fail the test . if a person gets a 15 on the test , will she pass or fail ? need help
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


I'm not sure what you need help with on this, unless you don't understand the vocabulary.

The mean is 23; the standard deviation is 6.6. One standard deviation below the mean is 23-6.6 = 16.4.

So the question is whether 15 is above or below 16.4. Above passes; below fails.

Answering the question should be simple.