# statistics

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**HELP** on
.

Working on "Inferences from Dependent Samples" trying to find the standard deviation of the difference data.

Differences: 24, 53, 100, 40, -10,71,77,70, 39, 50

n=10

d=51.4

sd=??? (Answer suppose to be 30.8336 but not coming close to this number at all)