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# Following data gives Sales (in Lakh Rs.) and Advertisement expenditure (in Thousand Rs.) of 20 firms.(115, 61), (120, 60), (128, 61), (121, 63), (137, 62), (139, 62), (143, 63), (117, 65), (126, 64), (141, 65), (140, 65), (153, 64), (129, 67), (130, 66), (150, 67), (148, 66), (130, 69), (138, 68), (155, 69), (172, 68).Construct a bivariate frequency distribution table for the above data by taking classes 115 – 125, 125 – 135, … etc. for sales and 60 – 62, 62 – 64, … etc. for advertisement expenditure. Verified
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Hint: Assume the Sales (in Lakh Rs.) as variable X and the Advertisement expenditure (in Thousand Rs.) as variable Y. Now, form the classes by checking the lowest and highest values of X and Y. In the horizontal column take the classes of values of X and in the vertical column take the classes of values of Y. Fill the boxes with the correct frequencies and take the sum f (X) = total frequency of X and f (Y) = total frequencies of Y to complete the table.