18. Exemplar exercise problems II

1. To draw a histogram to represent the following frequency distribution:

 

Class interval	\(5 - 10\)	\(10 - 15\)	\(15 - 25\)	\(25 - 45\)	\(45 - 75\)
Frequency	\(6\)	\(12\)	\(10\)	\(8\)	\(15\)

 

The adjusted frequency for the class \(25 - 45\) is:

 

2. For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abscissae are respectively :