The following data show the number of hours worked by 200 statistics students.Number of Hours Frequency0 - 9 4010 - 19 5020 – 29 7030 - 39 40The class width for this distribution is ______Select one:a.9b.10c.40d.0
Question
The following data show the number of hours worked by 200 statistics students.Number of Hours Frequency0 - 9 4010 - 19 5020 – 29 7030 - 39 40The class width for this distribution is ______Select one:a.9b.10c.40d.0
Solution
To find the class width for this distribution, we need to subtract the lower limit of one class from the lower limit of the next class.
For the given data, the lower limits of the classes are 0, 10, 20, and 30.
To find the class width between the first two classes, we subtract the lower limit of the first class (0) from the lower limit of the second class (10). This gives us a class width of 10.
Similarly, we can find the class width between the second and third classes by subtracting the lower limit of the second class (10) from the lower limit of the third class (20). This also gives us a class width of 10.
Finally, we can find the class width between the third and fourth classes by subtracting the lower limit of the third class (20) from the lower limit of the fourth class (30). Again, this gives us a class width of 10.
Since all the class widths are the same (10), the correct answer is (b) 10.
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