significance of data

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significance of data
Message posted by David (via 137.99.33.89) on December 28, 2001 at 12:43 PM (ET)

I have a set of 6 data points with associated standard deviations. On an x-y plot, one appears to be much lower than expected. I need to show that this difference is significant. I have done a 2nd order poly fit to the other SD error bars, and the SD of the point is outside this fit. Questions: (a) is this kosher, and (b) what's the right way to do this?

READERS RESPOND:
(In chronological order. Most recent at the bottom.)

Re: significance of data
Message posted by JG (via 128.8.22.30) on December 28, 2001 at 6:51 PM (ET)

How can a point have a SD ?

Re: significance of data
Message posted by David (via 137.99.33.89) on January 8, 2002 at 12:07 PM (ET)

Pardon the slip... To be more precise, I should have said, "points with associated standard deviations." Each represents three measurements. Does that help?

Re: significance of data
Message posted by Jack Tomsky (via 12.144.103.66) on January 8, 2002 at 5:29 PM (ET)

You can use Bartlett's test to test for the equality of the six standard deviations.

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