SOLUTION: Scores on a standardized test are normally distributed with a mean of 350 and a standard deviation of 25. Approximately what percent of students scored between 360 and 380?
a.10%
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-> SOLUTION: Scores on a standardized test are normally distributed with a mean of 350 and a standard deviation of 25. Approximately what percent of students scored between 360 and 380?
a.10%
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Question 915015: Scores on a standardized test are normally distributed with a mean of 350 and a standard deviation of 25. Approximately what percent of students scored between 360 and 380?
a.10%
b.16%
c.23%
d.38% Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! mean of 350 and a standard deviation of 25
z(360) = 10/25 = .4
z(380) = 30/25 = 1.2
P(350 < x < 380) = normalcdf(.4, 1.2)
