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प्रश्न
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.
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उत्तर
Let X = Sales (in lakh Rs.)
Y = Advertisement Expenditure (in Thousand Rs.)
Bivariate frequency table can be prepared by taking class intervals 115 – 125, 125 –135, ....etc for X and 60 – 62, 62 – 64, …. etc for Y.
Bivariate frequency distribution is as follows:
| Y/X | 115 – 125 | 125 – 135 | 135 – 145 | 145 –155 | 155 – 165 | 165 – 175 | Total (fy) |
| 60 – 62 | II (2) | I (1) | – | – | – | – | 3 |
| 62 – 64 | I (1) | – | III (3) | – | – | – | 4 |
| 64 – 66 | I (1) | I (1) | II (2) | I (1) | – | – | 5 |
| 66 – 68 | – | II (2) | – | II (2) | – | – | 4 |
| 68 – 70 | – | I (1) | I (1) | – | I (1) | I (1) | 4 |
| Total (fx) | 4 | 5 | 6 | 3 | 1 | 1 | 20 |
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