Question

In: Statistics and Probability

Fit your best model to the following data. I would recommend studying the data and then...

Fit your best model to the following data. I would recommend studying the data and then trying to fit it.
Y X1 X2 X3 X4 X5
12229.31 101.51 77.44 7.32 122.08 51.45
19218.63 109.89 99.24 7.83 119.57 54.4
2579.63 95.75 103.61 4.68 125.69 53.35
7780.87 112.54 128.57 6.78 118.16 56.02
2135.14 108 116.21 4.18 120.68 48.99
1719.99 114.41 112.48 3.09 123.92 58.45
4538.07 123.96 98.62 6.1 122.83 57.47
3243.55 96.29 96.24 5.33 121.36 43.93
6983.13 90.04 121.44 6.57 121.96 47.19
3235.18 91.7 61.63 5.39 120.02 47.9
2103.12 108.73 120.02 4.12 122.03 56.04
2000.89 93.88 122.2 2.35 120.39 42.25
18954.66 89.34 92.37 7.8 123.52 50.91
2086.63 104.08 117.3 3.89 121.24 52.49
3204.28 88.42 69.43 5.32 123.13 45.86
1822.59 105.95 115.24 2.75 124.01 49.56
2390.57 85.29 126.99 3.75 120.65 54.22
4338.25 138.88 118.28 6.11 122.1 63.37
2473.58 110.86 69.87 4.88 124.26 53.49
2596.05 89.8 116.02 4.5 118.81 49.45
2338.73 76.83 96.31 3.7 123.42 34.46
3569.73 95.71 86.47 5.55 122.14 47.51
2862.5 67.19 97.87 4.56 123.67 30.92
14147.04 69.71 90.53 7.45 124.9 30.95
1774.99 134.75 54.3 4.2 120.27 60.46
6220.95 65.01 133.29 6.28 125.55 27.01
2623.72 84.03 113.22 4.42 121.31 40.64
2346.63 121.21 95.38 4.84 121.71 58.26
2921.79 102.39 63.9 5.23 122.28 56.89
4350.55 92.65 66.3 5.93 119.75 54.95
1791.59 134.63 112.5 4.32 118.95 63.88
1940.6 137.34 109.26 4.62 117.28 76.68
3378.7 110.87 79.93 5.56 123.11 65.38
5624.47 87.26 82.34 6.29 124.58 47.06
1664.26 116.01 88.31 3.06 120.2 58.95
3183.2 106.05 82.26 5.41 121.43 49.96
2002.1 76.21 50.14 3.47 118.82 42.44
2184.77 91.38 81.27 4.04 122.16 52.77
2072.61 96.31 70.94 3.99 122.8 57.88
3020.82 76.38 70.55 5.08 121.89 32.03

Solutions

Expert Solution

The regression analysis is:

Removing the highly insignificant variable, we get:

Removing the highly insignificant variable, we get:

Removing the highly insignificant variable, we get:

The best model is:

y = -8,508.8639 + 2,570.5312*X3

0.658
r   0.811
Std. Error   2563.182
n   40
k   1
Dep. Var. Y
ANOVA table
Source SS   df   MS F p-value
Regression 47,93,81,671.5150 1   47,93,81,671.5150 72.97 2.25E-10
Residual 24,96,56,258.1865 38   65,69,901.5312
Total 72,90,37,929.7015 39  
Regression output confidence interval
variables coefficients std. error    t (df=38) p-value 95% lower 95% upper
Intercept -8,508.8639
X3 2,570.5312 300.9273 8.542 2.25E-10 1,961.3357 3,179.7266

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