How Do I Calculate Chi-Square?
If you take a college statistics course or if you work in a field that uses statistics, you may be required to perform a chi-square. The chi-square is a type of statistical test that examines the hypothesized results of a set of data as compared to the actual observed results. This tool looks at distributions of characteristics to test for statistical significance. Form a hypothesis concerning a potential set of data. For instance, out of 100 people who buy a car from a particular dealership that has red, blue white and black cars, you might hypothesize that 40 people will buy a white car, 30 will buy a blue car, 20 people will buy a black car and 10 people will buy a red car. Make observations and record the data. For instance, when you actually keep records concerning car purchases, you might find that 40 people bought a blue car, 25 bought a white car, 20 bought a red car and 15 bought a black car. Determine the deviation for each category by subtracting the hypothesized value from
