Question

Why is it true that classes in frequency distributions are all inclusive?
a. No data point falls into more than one class
b. There are always more classes than data points
c. All data fit into one class or another
d. All of these


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Answer 1

Explanation:

The correct option is (b) There are always more classes than data points.

Answer 2

A frequency distribution is a table that shows "classes" or "intervals" of data entries with a count of the number of entries in each class.

Class frequency refers to the number of observations in each class and n represents the total number of observations in the entire data set.

There should be between 5 and 20 classes. The class width should be an odd number. This will guarantee that the class midpoints are integers instead of decimals. The classes must be all-inclusive or exhaustive.

Therefore No data point falls into more than one class that is why classes in frequency distributions are all-inclusive.  

Thus we concluded that option (a) is the correct answer.