Q4 The large manufacturing company producing air-conditioner compressor believes the number of units of air-conditioner sold is related to atmospheric temperature. A research and development officer conducted a study and gathered the data in Table Q4. Table Q4: The production of air-conditioner compressor Day Temperature Sale (°C) (in thousand units) 1 63 1.52 2 70 1.68 3 73 1.80 4 75 2.05 5 80 2.36 6 82 2.25 7 85 2.68 8 88 2.90 9 90 3.14 10 91 3.06 11 92 3.24 12 75 1.92 13 98 3.40 14 100 3.28 Find the regression coefficients Po and ₁ by using the least-squares method. Predict the number of air-conditioner sold if the temperature soared to 120 °F. Calculate the coefficient of determination, r and coefficient of correlation, r. (a) (b) (c)

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Q4
The large manufacturing company producing air-conditioner compressor believes the
number of units of air-conditioner sold is related to atmospheric temperature. A research
and development officer conducted a study and gathered the data in Table Q4.
Table Q4: The production of air-conditioner compressor
Day
Temperature
Sale
(°C)
(in thousand units)
1
63
1.52
2
70
1.68
3
73
1.80
4
75
2.05
5
80
2.36
6
82
2.25
7
85
2.68
8
88
2.90
9
90
3.14
10
91
3.06
11
92
3.24
12
75
1.92
13
98
3.40
14
100
3.28
Find the regression coefficients Po and ₁ by using the least-squares method.
Predict the number of air-conditioner sold if the temperature soared to 120 °F.
Calculate the coefficient of determination, r and coefficient of correlation, r.
(a)
(b)
(c)
Transcribed Image Text:Q4 The large manufacturing company producing air-conditioner compressor believes the number of units of air-conditioner sold is related to atmospheric temperature. A research and development officer conducted a study and gathered the data in Table Q4. Table Q4: The production of air-conditioner compressor Day Temperature Sale (°C) (in thousand units) 1 63 1.52 2 70 1.68 3 73 1.80 4 75 2.05 5 80 2.36 6 82 2.25 7 85 2.68 8 88 2.90 9 90 3.14 10 91 3.06 11 92 3.24 12 75 1.92 13 98 3.40 14 100 3.28 Find the regression coefficients Po and ₁ by using the least-squares method. Predict the number of air-conditioner sold if the temperature soared to 120 °F. Calculate the coefficient of determination, r and coefficient of correlation, r. (a) (b) (c)
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