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10 cards from this deck
p โค 0.05 (5% or less)
No significant difference between observed & expected results
Comparing observed frequencies with expected frequencies
ฯ2=โ(OโE)2E\chi^2 = \sum \frac{(O-E)^2}{E}ฯ2=โE(OโE)2โ
Number of categories - 1
Comparing means from two independent groups
(n1+n2)โ2(n_1 + n_2) - 2(n1โ+n2โ)โ2
-1 to +1
nโ2n - 2nโ2
Calculated ฯยฒ > critical value at p=0.05
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