SOLUTION: Is 120.5 correct? A standardized test has a mean of 600 and a standard deviation of 75. If 1000 students took the test and their scores approximated a normal curve, how many scored
Algebra.Com
Question 366857: Is 120.5 correct? A standardized test has a mean of 600 and a standard deviation of 75. If 1000 students took the test and their scores approximated a normal curve, how many scored between 600 and 750?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Is 120.5 correct? A standardized test has a mean of 600 and a standard deviation of 75. If 1000 students took the test and their scores approximated a normal curve, how many scored between 600 and 750?
----------------
P(600< x < 750) = 0.477250
----
# that scored between 600 and 750 = 0.477250*1000 = 477.25
= 478 when rounded up
===========================
Cheers,
Stan H.
RELATED QUESTIONS
A standardized test has a mean of 600 and a standard deviation of 75. If 1000 students... (answered by stanbon)
On a standardized test with a normal distribution the mean is 500 and the deviation is... (answered by ewatrrr)
A standardized test is designed so that the scores are normally distributed with a mean... (answered by dfrazzetto)
In an standardized test the mean score of students is 560 and a standard deviation of 15. (answered by robertb)
Students at Arrowhead High School took a Math test with a mean of 120 and a standard... (answered by Theo)
A teacher finds that the test scores of a group of 40 students have a mean of 75 and a... (answered by solver91311)
The mean score for a standardized test is 1700 points. The results are normally... (answered by reviewermath)
The scores of students on a standardized test are normally distributed with a mean of 300 (answered by stanbon)
In a recent year, scores on a standardized test for high school students with a 3.50 to... (answered by Boreal)