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. 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

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.  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. This is because a polygon is a line graph that connects these midpoints to show the distribution of the data.

Automobiles Traveling on a Road with a Posted Speed Limit