The option that isn't a requirement when an individual is conducting the goodness-of-fit test is C. For each category, the observed frequency is at least 5.
The goodness-of-fit test simply means a statistical hypothesis test that's used to see how a sample data will be able to fit a distribution from a population with a normal distribution.
To conduct the test, the sample data must consist of frequency counts for each of the different categories, the data must have been randomly selected, and the expected frequency is at least 5.
In conclusion, for each category, the observed frequency is at least 5 is the right option.
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