To determine if a set of ungrouped, raw data is normally distributed, the cumulative relative frequency distribution of the raw data is compared to a
A) grouped relative frequency distribution.
B) cumulative normal distribution.
C) Anderson-Darling statistic.
D) chi-square statistic.

Question

Quizplus · Accepted Answer

To determine if a set of ungrouped, raw data is normally distributed, the cumulative relative frequency distribution of the raw data should be compared to a cumulative normal distribution. This can be done visually with a normal probability plot or through statistical tests such as the Shapiro-Wilk test or Kolmogorov-Smirnov test. Comparing the data to a grouped relative frequency distribution or using the Anderson-Darling or chi-square statistic would not be appropriate for this purpose.

To Determine If a Set of Ungrouped, Raw Data Is