Answer and Explanation :
Given : A data set has values ranging from a low of 10 to a high of 50. The class width is to be 10.
To find : What's wrong with using the class limits 10-20, 21-31, 32-42, 43-53 for a frequency table with a class width of 10?
Solution :
The frequency of a class is the number of data entries in the class.
Each class have a lower class limit and an upper class limit.
The class width of the frequency is defined as the distance between the lower limits of consecutive classes.
Class limits 10-20, 21-31, 32-42, 43-53
Highest limit is 50 but data has 53.
According to question,
Last class limit should be 43-50 which has class width 7 not 10.
Class limit is also not continuous.
