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OpenStudy (anonymous):
PLEASE HELP!! See attachment.
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OpenStudy (anonymous):
OpenStudy (anonymous):
Working out the mean and the s.d. would be a start
OpenStudy (anonymous):
well for the mean i have -1.4 and s.d. i have 2.31
OpenStudy (anonymous):
That's the mean and s.d. of differences of diamond minus steel ball?
OpenStudy (anonymous):
If they are, we need this to 2 decimal places
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OpenStudy (anonymous):
is the mean exactly -1.4?
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