1) C. because it’s an independent sample and is less than 0 because you can have to take the
average from before the table and the after. And it’s less than 0 because I made before table
0 and subtracted 1 which represented after table and it turned out to be negative which is
less than 0
2) Not enough info for this question because I need the chart.
3) It’s both B and C because the Pvalue is basically 0 and you reject at both alphas
4) D because it’s a before and after test and it used random experiments.
5) B. because it had 2 criterias which were significant statistical relationship and no
alternative explanations.
6) C. because it’s a independent sample and is greater than 0
7) D because it’s independent and the pvalue is less than alpha meaning you reject and
when you reject you use the assume unequal
8) Both B and C because the alpha is basically 0 and so you reject at both alphas
9) I used nonexperimental because there was no random events.
10)
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 Spring '08
 SandeepGoyal
 Statistics, Variance, Student's ttest, independent sample

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