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midterm2review

# midterm2review - z Score Formulas z =(x x =(z z = desired...

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z = ( x - μ )/ σ x = μ + (z)( σ ) z’ = desired mean + (z)(desired standard deviation) z Score Formulas 1

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The Standard Normal Curve Assumptions for using the Standard Normal Curve to determine probabilities for z Scores: The data comes from a population that is normally distributed The population mean is known The population variance is known 2
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Linear Correlation: Pearson’s r A measure of the strength, and direction, of the linear relationship between two variables Takes values ranging from 1 to -1 Values of r close to 1 or -1 indicate a stronger relationship; values close to 0 indicate a weaker relationship Positive values indicate a positive relationship; negative values indicate a negative relationship 4
z Score formula for r r = z x z y n - 1 Where z x and z y are the sample z -transformed scores for the i th individual on the variables x and y , and n = the number of paired observations in the sample (i.e., half the total number of scores) z x = z x = x i - X s x y i - Y s y 5

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Pearson’s r from Covariance SP xy SS x SS y r = (x - X)(y - Y) ( (x - X) 2 )( (y - Y) 2 ) r = Computational Formula for SP xy SP xy = (xy) - ( x )( y ) n 6
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midterm2review - z Score Formulas z =(x x =(z z = desired...

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