Question

In the frequency distribution from Section 1.2 Exercise #2 in the text, what is the lower class boundary for the class "30-39"?

A) 29.5
B) 30
C) 39
D) 40

Answer 1

The lower class boundary for the class "30-39" in a frequency distribution is 29.5, as it is traditionally calculated as 0.5 less than the lowest class limit.

Step-by-step explanation:

The lower class boundary for the class "30-39" in a frequency distribution is determined by the value that there are no possible data points between it and the next lowest value. In this case, the class is clearly defined as 30 to 39, so the lower boundary must be a value that is not included in the previous class and is less than 30. Typically, the lower class boundary is found by subtracting 0.5 from the lowest class limit provided that classes do not overlap and data are continuous. Therefore, the lower class boundary for the class "30-39" would be 29.5 (Option A).