SOLUTION: If 200 students write a test and the average score is 77%. With a standard deviation of 8%. How many students scored less then 59%?

SOLUTION: If 200 students write a test and the average score is 77%. With a standard deviation of 8%. How many students scored less then 59%?

Algebra.Com

Question 947317: If 200 students write a test and the average score is 77%. With a standard deviation of 8%. How many students scored less then 59%?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the z-score,

Find the probability,

So then,

Rounding down, that would be students.

RELATED QUESTIONS
the mean test score of 50 students in a statistics class is 80 with a standard deviation... (answered by Boreal)

I need help with this question. The scores for math test #3 were normally distributed. If (answered by Fombitz)

In recent year, grade 10 new york state public school students taking a geometry... (answered by reviewermath)

The mean science achievement score of a group of Grade 8 students is 78 and s of 10.... (answered by stanbon)

What is the critical value for these? How do I work them out to get the answer? 1.... (answered by ewatrrr)

Two groups of students took a certain test with possible scores 1,2,3,4,5,6,7,8,9,10.... (answered by robertb)

The scores in a Statistics test follow a normal distribution with an average score of 82... (answered by Theo)

there is a class of 25 students and the mean score of their test is 60 out 100, with a... (answered by ewatrrr)

40 students scored 70 on a test the standard deviation is 5.5 if the test of 10 students... (answered by stanbon)