This exercise requires the use of a computer package. The cotton aphid poses a threat to
Chapter 0, Problem 14.33(choose chapter or problem)
This exercise requires the use of a computer package. The cotton aphid poses a threat to cotton crops in Iraq. The accompanying data on y infestation rate (aphids/100 leaves) x1 mean temperature (C) x2 mean relative humidity appeared in the article Estimation of the Economic Threshold of Infestation for Cotton Aphid (Mesopotamia Journal of Agriculture [1982]: 7175). Use the data to find the estimated regression equation and assess the utility of the multiple regression model y a b1x1 b2x2 e y x1 x2 y x1 x2 61 21.0 57.0 77 24.8 48.0 87 28.3 41.5 93 26.0 56.0 98 27.5 58.0 100 27.1 31.0 104 26.8 36.5 118 29.0 41.0 102 28.3 40.0 74 34.0 25.0 63 30.5 34.0 43 28.3 13.0 27 30.8 37.0 19 31.0 19.0 y x1 x2 y x1 x2 14 33.6 20.0 23 31.8 17.0 30 31.3 21.0 25 33.5 18.5 67 33.0 24.5 40 34.5 16.0 6 34.3 6.0 21 34.3 26.0 18 33.0 21.0 23 26.5 26.0 42 32.0 28.0 56 27.3 24.5 60 27.8 39.0 59 25.8 29.0 82 25.0 41.0 89 18.5 53.5 77 26.0 51.0 102 19.0 48.0 108 18.0 70.0 97 16.3 79.5 A
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