The following class intervals for a frequency distribution were developed to pro

Question

The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school: Before data was collected, someone questioned the validity of this arrangement. Which of the following represents a problem with this set of intervals? There are too many intervals. The class widths are too small. Some salaries would fall into two different intervals. The first and the second interval overlap. There are too few intervals.

Explanation / Answer

The intervals '31-under 35' and '34-under 37' overlap with each other. So, there will be some salary values that would fall in two different intervals. e.g. a salary of 34500 would fall in both these intervals.

All the salary values which are equal to or more than 34000 and less than 35000 will fall in both these intervals.

Hence, 3rd option is the correct answer - Some salaries would fall into two different intervals

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