Exhibit 2-10.Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following table is a frequency distribution of speeds. Refer to Exhibit 2-10.When using a polygon to graph quantitative data,what does each point represent?
A)The lower limit of a particular class and its width
B)The midpoint of a particular class and its associated frequency or relative frequency
C)The midpoint of a particular class and its associated cumulative frequency or cumulative relative frequency
D)The upper limit of a particular class and its associated cumulative frequency or cumulative relative frequency

Question

Exhibit 2-10.Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following table is a frequency distribution of speeds.  Refer to Exhibit 2-10.When using a polygon to graph quantitative data,what does each point represent?
A)The lower limit of a particular class and its width 
B)The midpoint of a particular class and its associated frequency or relative frequency 
C)The midpoint of a particular class and its associated cumulative frequency or cumulative relative frequency 
D)The upper limit of a particular class and its associated cumulative frequency or cumulative relative frequency

Quizplus · Accepted Answer

When using a polygon to graph quantitative data, each point represents the midpoint of a particular class and its associated frequency or relative frequency. In this way, a line connecting these points creates a visual representation of the distribution of data.