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Sia ? 4 years, 7 months ago
Sample mean = x = ( Σ xi ) / n
Sample standard deviation = s = sqrt [ Σ ( xi - x )2 / ( n - 1 ) ]
Sample variance = s2 = Σ ( xi - x )2 / ( n - 1 )
Variance of sample proportion = sp2 = pq / (n - 1)
Pooled sample proportion = p = (p1 * n1 + p2 * n2) / (n1 + n2)
Pooled sample standard deviation = sp = sqrt [ (n1 - 1) * s12 + (n2 - 1) * s22 ] / (n1 + n2 - 2) ]
Sample correlation coefficient = r = [ 1 / (n - 1) ] * Σ { [ (xi - x) / sx ] * [ (yi - y) / sy ] }
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