Chi Square

The video tutorial explains the Chi Square test, a non-parametric test used for analyzing differences and correlations in nominal data. It uses Piaget's conservation experiment as an example, formulating a hypothesis that seven-year-olds are more likely to conserve than five-year-olds. The tutorial covers the calculation of degrees of freedom, expected values, and the Chi Square statistic. It concludes by determining the statistical significance of the results, allowing the rejection of the null hypothesis.

What type of test is the Chi Square test?

• Parametric test

• Inferential test

• Non-parametric test

• Descriptive test

In Piaget's conservation experiment, which age group is hypothesized to be better at conserving?

• Six-year-olds

• Seven-year-olds

• Five-year-olds

• Eight-year-olds

How do you calculate the expected values in a contingency table?

• Grand total divided by row total

• Row total times column total divided by grand total

• Column total divided by row total

• Row total divided by column total

What is the next step after calculating observed minus expected values?

• Calculate the sum of observed values

• Calculate the difference between expected values

• Calculate the square of observed minus expected values

• Calculate the product of observed and expected values

What must the calculated Chi Square value be compared to in order to determine significance?

• The critical value

• The median value

• The mean value

• The mode value