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This is a Minitab printout. I want to find the value of A5, or S.

I think S is supposed to be the sample standard deviation, but I don't know how to calculate it. Any tips on how I should go about calculating it?

  • 1
    Is this for a homework or a test? "A5", "A6", and "A7" look like they are placeholders for values that were produced but are being hidden from you on purpose. – whuber Mar 31 '11 at 22:02
  • It's a homework problem. I can do A6 and A7 by myself, I just need some tips on A5. – Patience Mar 31 '11 at 22:28
  • 1
    Consider the relationships between SD, variance, and total sum of squares about the mean. – whuber Mar 31 '11 at 22:36
up vote 1 down vote accepted

I got it! It's the sqrt of residual SS / (n-2). Cheers!

  • 1
    In that case it's not the "sample standard deviation," but the residual standard deviation. :-) – whuber Mar 31 '11 at 22:51
  • I see, thanks for your help :) – Patience Mar 31 '11 at 23:42

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