Math Is Fun Forum

casper0611

Member

Registered: 2010-01-06

Posts: 1

Z score value?

I have never heard of this...

A normal distribution has a mean of 23.5 and a standard deviation of 3.51.  Find the data value corresponding to a z-score value of 1.32.

I asked 2 friends, here is what we came up with for answers:

34.63
28.27
27.41
18.73

Who is correct?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Z score value?

Hi casper0611;

None of those answers are correct.

23.5-1.32*3.51 = 18.8668

23.5+1.32*3.51 = 28.1332

So 28.1332 and 18.8668 are both 1.32 sd's from the mean

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