Using a graphical method to determine if a set of ungrouped, raw data is normally distributed, the data would be normally distributed if
A) the plot of the data was curvilinear.
B) the data was randomly distributed.
C) the plot of the data was linear.
D) the plot of the data was significantly different from zero.

Question

Quizplus · Accepted Answer

A graphical method of determining normal distribution involves creating a histogram or a frequency polygon of the data. If the histogram or frequency polygon creates a bell-shaped curve, then the data is normally distributed. Therefore, the plot of the data should be linear, indicating a bell-shaped curve, which corresponds to normal distribution. A curvilinear plot (choice A) suggests non-normality, while a randomly distributed data (choice B) does not sufficiently indicate normality, as the distribution could still be bimodal or skewed. The plot of the data being significantly different from zero (choice D) is not a consideration when determining normality.

Using a Graphical Method to Determine If a Set of Ungrouped