A market researcher believes that industry type is independent of the operating margin.He compiles a table with seven industry classifications and classifies operating margin into five levels.When applying a chi-square test of independence to this table, the number of degrees of freedom is _____.

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test of independence is calculated as (number of rows - 1) * (number of columns - 1). Here, with seven industry classifications (rows) and five levels of operating margin (columns), the degrees of freedom = (7 - 1) * (5 - 1) = 6 * 4 = 24.

A Market Researcher Believes That Industry Type Is Independent of the Operating