The Conrad Real Estate Company recently conducted a statistical test to determine whether the number of days that homes are on the market prior to selling is normally distributed with a mean equal to 50 days and a standard deviation equal to 10 days. The sample of 200 homes was divided into 8 groups to form a grouped data frequency distribution. The degrees of freedom for the test will be 7.

Question

Quizplus · Accepted Answer

In a chi-square goodness-of-fit test, the degrees of freedom are calculated as the number of categories (groups) minus 1. Since the homes were divided into 8 groups, the degrees of freedom would be 8 - 1 = 7.

The Conrad Real Estate Company Recently Conducted a Statistical Test