SOLUTION: The scores of students on an exam are normally distributed with a mean of 384 and a standard deviation of 84.
(a) What is the first quartile score for this exam?
Answer:
(b)
Algebra.Com
Question 1167003: The scores of students on an exam are normally distributed with a mean of 384 and a standard deviation of 84.
(a) What is the first quartile score for this exam?
Answer:
(b) What is the third quartile score for this exam?
Answer:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=-0.674 for Q1 and +0.674 for Q3
z=(x-mean)/sd
-0.674=(x-384)/84
-56.6=x-384
x=327.4 for Q1 and 440.6 for Q3
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