A researcher conducted a goodness-of-fit test by using categorical data. Her data consists of 7 categories. Her null hypothesis states that the data occur in each category with the same frequency. If she found the test statistic 2=2=17.21:

What is the degree of freedom of the 22 statistic?

What is the P-value of the goodness-of-fit test? (Round to 3 decimals)

Given the significance level of 0.01, what can she conclude from the test?

• The data does NOT occur in each category with the same frequency.
• The data occur in each category with the same frequency.