The x distribution must be normal in order to use a chi-square distribution to t

Question

The x distribution must be normal in order to use a chi-square distribution to test the variance. What are some methods you can use to assess whether the x distribution is normal?
Hint: Try utilizing a goodness-of-fit test. (Select all that apply.)

~Look at a normal quantile plot to check for a straight line.

~Look at a residual plot for a parabolic pattern.

~Use a goodness-of-fit test to see if the distribution follows the empirical rule.

~Use a histogram or boxplot to check for symmetry and outliers.

~Look at a normal quantile plot to check for a curved line.

Explanation / Answer

Answers areas follows:

~Look at a normal quantile plot to check for a straight line.

~Use a goodness-of-fit test to see if the distribution follows the empirical rule.

~Use a histogram or boxplot to check for symmetry and outliers.

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