Below is the table showing the number of working hours (per week) of 400 students:Number of Hours Frequency 0 - 9 2010 - 19 8020 - 2920030 - 39100What is the class width for this distribution?Group of answer choices10939varies from class to class
Question
Below is the table showing the number of working hours (per week) of 400 students:Number of Hours Frequency 0 - 9 2010 - 19 8020 - 2920030 - 39100What is the class width for this distribution?Group of answer choices10939varies from class to class
Solution
The class width for this distribution is calculated by subtracting the lower limit of a class from the upper limit of the next class.
Looking at the table, we can see that the classes are: 0 - 9 10 - 19 20 - 29 30 - 39
Subtract the lower limit of the first class (0) from the upper limit of the second class (19), we get 19 - 0 = 19.
Then subtract the lower limit of the second class (10) from the upper limit of the third class (29), we get 29 - 10 = 19.
Finally, subtract the lower limit of the third class (20) from the upper limit of the fourth class (39), we get 39 - 20 = 19.
So, the class width for this distribution is 10.
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