Disparate Impact Analysis
(an On-Line Internet based application)

Instructions: Please fill out the information into the form below. Once you have entered your data below, you may select the types of analysis to be conducted by checking the appropriate boxes. Then press the compute button at the bottom of the form to view the results.

Select the type of employment decision:
Enter a title for your report:
-Adverse Impact
 -Chi-Square
-Standard Deviation
 -Confidence Intervals
 Probability Distribution 		Select the Statistical Tests you wish to execute by checking or unchecking the boxes on the left. Then press the 'Compute' button below.
Display: Description of Statistic Interpretation of Results


Adverse-Impact Report

Adverse Impact and the "four-fifths rule." - A selection rate for any race, sex, or ethnic group which is less than four-fifths (4/5ths) (or eighty percent) of the rate for the group with the highest rate will generally be regarded by the Federal enforcement agencies as evidence of adverse impact. Uniform Guidelines on Employee Selection Procedures

Chi-Square Report

Standard-Deviation Report

The difference between the proportion of the protected class and the proportion of all has a normal distribution with a mean and standard deviation. The statistic is shown below: 
           (r / n) - p            
  ------------------------------  
  sqrt(p * (1-p) / n) * sqrt(1-q)

Confidence Interval Report

The proportion of the protected class has an expected value that would fall within a specified confidence interval. The statistic is shown below:
Observed value = (r / n)
Expected value = p
------------------------------
Standard Deviation = sqrt(p * (1-p) / n) * sqrt(1-q)

Confidence Interval:
Lower Bound = p - 1.96 * Std Dev
Upper Bound = p + 1.96 * Std Dev



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