Re: Basic rookie question about standard error

Thanks for all the help guys, that really clears thing up for me at
last!!

The zeros do not represent n/a and hence they should be used for
calcualtion of the mean and standard error :)

(told you so, Gráinne!)

>By the way, if you remove the zeros, you would be making one of the
>same mistakes that doomed Space Shuttle Challenger.

....really? What happened there?

.

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