Z scores and proportion
Message posted by timmy (via 64.12.106.48) on July 8, 2001 at 12:38 PM (ET)

Having a tough time with this problem. Can anyone Please help me!

Jonathan's final grades in four of his classes as well as the means and standard deviations for each class are listed. ( assume the distribution is normal)

COURSE GRADE Mean SD
MATH 78 82 2.3
ENG 94 90 4.8
SPAN 81 79 1.1
BIO 92 85 4.6

a)What are the Z scores for each of Jonathans grades.
b)What proportion of Jonathan's classmates scored less than him for each class?

C)In comparison to his classmates which is Jonathan's strongest subject

d) In comparison to his classmates which is Jonathan's weakest subject?

THANK YOU

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Re: Z scores and proportion
Message posted by JG (via 128.8.23.152) on July 8, 2001 at 4:36 PM (ET)

c. S
d. M