On a test, mean score was 70 and the standard deviation of the scores was 15.
what is the probability that a randomly selected test taker scored below 50?

Step-by-step explanation:

To  find the probability that a randomly selected test taker scored below 50, we need to first of all determine the z-score of 50.

The z-score for a normal distribution is given by:

.

From the question, the mean score is , the standard deviation is, , and the test score is .

We substitute these values into the formula to get:

 .

 .

We now read the area that corresponds to a z-score of -1.33 from the standard normal distribution table.

From the table, a z-score of -1.33 corresponds to and area of 0.09176.

Therefore the probability that a randomly selected test taker scored below 50 is

hi!

i believe that john has 55 pieces of candy left.

!

nlgqer

step-by-step