excel answer questions

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movtgvtre0011

Economics

Description

1. A sample of 50 wines is stored in the VinhoVerde.xlsx Excel file posted in the Datasets for Class folder in Canvas. Develop a simple linear regression model to predict wine quality using alcohol content. Wine quality is measured on a 0 to 10 scale, where 0 is bad and 10 is excellent.

a. Construct a scatter plot. Put wine quality on the Y axis and alcohol content on the X axis.

b. What is the independent variable in this model? What is the dependent variable?

c. Write out the simple linear regression model to be estimated.

d. Estimate the model using least-squares method. What is the prediction line?

e. Interpret the meaning of the Y intercept, b0, in this problem.

f. Interpret the meaning of the slope, b1, in this problem.

g. Using your answer from part d, predict the mean wine quality for wines with a 10% alcohol content.

h. What conclusions can be reached based on your results?

Unformatted Attachment Preview

Fixed Acidity Volatile Acidity Citric Acid Residual Sugar Chlorides Free Sulfur Dioxide 11.5 0.3 0.6 2 0.067 12 7.7 0.715 0.01 2.1 0.064 31 10.4 0.575 0.61 2.6 0.076 11 9.2 0.63 0.21 2.7 0.097 29 7.9 0.35 0.46 3.6 0.078 15 8.9 0.745 0.18 2.5 0.077 15 7.6 0.51 0.24 2.4 0.091 8 10.8 0.5 0.46 2.5 0.073 5 6.4 0.47 0.4 2.4 0.071 8 9.9 0.63 0.24 2.4 0.077 6 6.9 0.685 0 2.5 0.105 22 7.3 0.45 0.36 5.9 0.074 12 6.8 0.81 0.05 2 0.07 6 7.5 0.51 0.02 1.7 0.084 13 10.4 0.34 0.58 3.7 0.174 6 7.1 0.46 0.14 2.8 0.076 15 9.1 0.5 0.3 1.9 0.065 8 7.3 0.69 0.32 2.2 0.069 35 7.7 0.6 0 2.6 0.055 7 6.7 0.46 0.24 1.7 0.077 18 8.6 0.47 0.27 2.3 0.055 14 8.3 0.65 0.1 2.9 0.089 17 6 0.31 0.47 3.6 0.067 18 8.6 0.49 0.28 1.9 0.11 20 7.9 0.54 0.34 2.5 0.076 8 10.2 0.49 0.63 2.9 0.072 10 8 0.33 0.53 2.5 0.091 18 7.6 0.39 0.31 2.3 0.082 23 7.1 0.59 0 2.1 0.091 9 8.3 0.6 0.13 2.6 0.085 6 8.8 0.46 0.45 2.6 0.065 7 8.5 0.47 0.27 1.9 0.058 18 10.2 0.645 0.36 1.8 0.053 5 11.6 0.32 0.55 2.8 0.081 35 6.3 0.55 0.15 1.8 0.077 26 7.5 0.38 0.48 2.6 0.073 22 9.1 0.765 0.04 1.6 0.078 4 8.4 1.035 0.15 6 0.073 11 6.2 0.56 0.09 1.7 0.053 24 7.3 0.74 0.08 1.7 0.094 10 7.8 0.39 0.42 2 0.086 9 10.4 0.44 0.42 1.5 0.145 34 11.6 0.47 0.44 1.6 0.147 36 8.3 0.65 0.1 2.9 0.089 17 6.3 0.55 0.15 1.8 0.077 26 6.7 1.04 0.08 2.3 0.067 19 7.2 0.33 0.33 1.7 0.061 3 6.8 0.815 0 1.2 0.267 16 5.5 0.49 0.03 1.8 0.044 28 7.4 0.59 0.08 4.4 0.086 6 Total Sulfur Dioxide 27 43 24 65 37 48 38 27 19 33 37 87 14 31 16 37 17 104 13 34 28 40 42 136 17 26 80 71 14 24 18 38 14 67 35 84 14 54 32 45 21 48 51 40 35 32 13 29 87 Density 0.9981 0.99371 1 0.9988 0.9973 0.99739 0.998 1.0001 0.9963 0.9974 0.9966 0.9978 0.99562 0.99538 0.997 0.99624 0.99774 0.99632 0.99639 0.9948 0.99516 0.99803 0.99549 0.9972 0.99235 0.9968 0.9976 0.9982 0.99488 0.9984 0.9947 0.99518 0.9982 1.0002 0.99314 0.9972 0.998 0.999 0.99402 0.99576 0.99526 0.99832 0.99836 0.99803 0.99314 0.99648 0.996 0.99471 0.9908 pH Sulphates Alcohol Quality 3.11 0.97 10.1 6 3.41 0.57 11.8 6 3.16 0.69 9 5 3.28 0.58 9.6 5 3.35 0.86 12.8 8 3.2 0.47 9.7 6 3.47 0.66 9.6 6 3.05 0.64 9.5 5 3.56 0.73 10.6 6 3.09 0.57 9.4 5 3.46 0.57 10.6 6 3.33 0.83 10.5 5 3.51 0.66 10.8 6 3.36 0.54 10.5 6 3.19 0.7 11.3 6 3.36 0.49 10.7 5 3.32 0.71 10.5 6 3.33 0.51 9.5 5 3.38 0.56 10.8 5 3.39 0.6 10.6 6 3.18 0.8 11.2 5 3.29 0.55 9.5 5 3.39 0.66 11 6 2.93 1.95 9.9 6 3.2 0.72 13.1 8 3.16 0.78 12.5 7 3.37 0.8 9.6 6 3.52 0.65 9.7 5 3.42 0.55 11.5 7 3.31 0.59 9.2 6 3.32 0.79 14 6 3.16 0.85 11.1 6 3.17 0.42 10 6 3.32 0.92 10.8 7 3.32 0.82 11.6 6 3.32 0.7 9.6 4 3.29 0.54 9.7 4 3.37 0.49 9.9 5 3.54 0.6 11.3 5 3.24 0.5 9.8 5 3.39 0.66 11.6 6 3.38 0.86 9.9 3 3.38 0.86 9.9 4 3.29 0.55 9.5 5 3.32 0.82 11.6 6 3.52 0.57 11 4 3.23 1.1 10 8 3.32 0.51 9.8 3 3.5 0.82 14 8 29 0.9974 3.38 0.5 9 4
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Explanation & Answer

The solution is attached.It is contained in the RESULT sheet on the excel file.

Fixed Acidity Volatile Acidity Citric Acid Residual Sugar Chlorides Free Sulfur Dioxide
11.5
0.3
0.6
2
0.067
12
7.7
0.715
0.01
2.1
0.064
31
10.4
0.575
0.61
2.6
0.076
11
9.2
0.63
0.21
2.7
0.097
29
7.9
0.35
0.46
3.6
0.078
15
8.9
0.745
0.18
2.5
0.077
15
7.6
0.51
0.24
2.4
0.091
8
10.8
0.5
0.46
2.5
0.073
5
6.4
0.47
0.4
2.4
0.071
8
9.9
0.63
0.24
2.4
0.077
6
6.9
0.685
0
2.5
0.105
22
7.3
0.45
0.36
5.9
0.074
12
6.8
0.81
0.05
2
0.07
6
7.5
0.51
0.02
1.7
0.084
13
10.4
0.34
0.58
3.7
0.174
6
7.1
0.46
0.14
2.8
0.076
15
9.1
0.5
0.3
1.9
0.065
8
7.3
0.69
0.32
2.2
0.069
35
7.7
0.6
0
2.6
0.055
7
6.7
0.46
0.24
1.7
0.077
18
8.6
0.47
0.27
2.3
0.055
14
8.3
0.65
0.1
2.9
0.089
17
6
0.31
0.47
3.6
0.067
18
8.6
0.49
0.28
1.9
0.11
20
7.9
0.54
0.34
2.5
0.076
8
10.2
0.49
0.6...


Anonymous
Excellent! Definitely coming back for more study materials.

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