Math Is Fun Forum

mantastrike

Member

Registered: 2011-04-24

Posts: 64

Final Question Please Help Me!!

A set of final examination marks in an accounting course appear to be normally distributed with a mean of 74 and a standard deviation of 12

a) what is the probability of getting a mark of 75 or less on this exam?
b) what is the probability of getting mark of more than 85 on this exam?
c) what is the probability of students scoring between 85 and 100?
d) 70% of the students have a mark higher than what mark?
c) 25% of the students have a mark less than what mark?

Please help me it would be great if you could show work on how you did it.!

THANK YOU!!

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Final Question Please Help Me!!

Hi;

a) Use a z table.

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