Question: What is wrong with the following grouped frequency c Grades Frequency 50-55 2 55-60 4 60-70 9 70-80 15 80-90 7 90 and above

What is wrong with the following grouped frequency c Grades Frequency 50-55

What is wrong with the following grouped frequency c Grades Frequency 50-55 2 55-60 4 60-70 9 70-80 15 80-90 7 90 and above 4 The classes do not all have the same width There are open-ended classes The classes overlap

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