Posted by Misty on Saturday, October 6, 2012 at 8:39pm.
I'm assuming your problem is this:
(19.2 - 21.1)/(3.18/√25)
Calculating:
(-1.9)/(3.18/5) =
(-1.9)/(0.636) =
-2.99 (rounded to two decimal places)
I hope this helps and is what you were asking.
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