The null hypothesis states that the sample data came from a normally distributed population. The researcher calculates the sample mean and the sample standard deviation from the data. The data arrangement consisted of five categories. Using $\alpha$ = 0.05, the appropriate critical value for this chi-squared test for normality is 5.99147.

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The critical value for a chi-squared test for normality with 5 categories and $\alpha$ = 0.05 is 5.99147.

The Null Hypothesis States That the Sample Data Came from a Normally