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GLENN GILONGOS
GLENN GILONGOS,
Category: Calculus and Above
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This is a bell curve question. If 99 people take an exam. If

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This is a bell curve question. If 99 people take an exam. If 33 did poor, 33 did average and 33 did well, can you demonstrate that with a bell curve or a normal distribution curve?

Hi

 

How many questions do you have and when is the deadline?

Customer: replied 10 days ago.
I'm attempting to better understand a bell curve or normal curve for my own self-improvement.

Ok please hold on, I am working now on this, (once I post the answer, please do not forget to rate at least 3 stars the answer I will post) Thank you

 

Are you still there? Please reply (I am finished now with the answer)

ANSWER:

 

33/99 = 1/3

 

Find Z such that P( z < Z) = 1/3

 

Using a normal distribution table:

 

Z = -0.4307

 

So we divide the normal curve into 3 regions separated by two z-scores:

 

Z = -0.4307 and Z = 0.4307

Please do not forget to rate (5 stars) and accept the answer posted, so I will also get credit in helping you.

 

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