Construction of a frequency distribution

"Equal width for different classes is preferred in construction fo frequency distribution" Explain.

The following table shows the cumulative distribution of marks of 800 students in an examination. Construct a frequency distribution table.

Which one of the following measures is determined only after the construction frequency distributions

The following table show tha cumulative frequency distribution of marks of 800 students in an examination. Construct a frequency distribution table for the data above.

The following table show tha cumulative frequency distribution of marks of 800 students in an examination. Construct a frequency distribution table for the data above.

Construct a frequency distribution table from the following cumulative frequency distribution : {:("Calss Interval","Cumulative Frequency"),(10-19,8),(20-29,19),(30-39,23),(40-49,30):}

Construct a frequency distribution table from the following cumulative frequency distribution : {:("Calss Interval","Frequency"),(5-10,18),(10-15,30),(15-20,46),(20-25,73),(25-30,90):}

Construct a frequency distribution table for each of the following distributions {:(" Marks (less than) ", 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100),(" Cumulative Frequency " ,0, 7, 28, 54, 71, 84, 105, 147, 180, 196, 200):}

Construct a frequency distribution table for each of the following distributions {:(" Marks (more than) ", 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100),(" Cumulative Frequency " ,100, 87, 65, 55, 42, 36, 31, 21, 18, 7, 0):}

Construct a frequency distributions table from the following cumulatvive frequency table. {:( " Class interval " , ," Cumulative Frequency "),( 0-9 , , 15),(10-19, ,23),(20-29, ,38),(30-39,, 56),(40-49,,68),(50-59,,90 ):}