The management at a company that sells and services exercise equipment would like to determine if there is a relationship between the number of minutes required to complete a routine service call and the number of machines serviced. A random sample of 12 records revealed the information available below concerning the number of machines serviced and the time (in minutes) to complete the routine service call. Complete parts a and b below. E Click the icon to view the data. ..... a. Estimate the least squares regression equation. The regression equation is y= ) x. (Round to two decimal places as needed.) b. If a gymnasium had nine machines, how many minutes should the company expect a routine service call to require. A routine service call should require about minutes if there are nine machines. (Round to the nearest minute as needed.) - X Cost of Small Projects Data Number of Service Time (minutes) 115 Machines 12 8 10 65 80 85 50 60 8. 7 65 3 40 95 11 4 45 35 11 105

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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The management at a company that sells and services exercise equipment would like to determine if there is a relationship between the number of minutes required to complete a
routine service call and the number of machines serviced. A random sample of 12 records revealed the information available below concerning the number of machines serviced
and the time (in minutes) to complete the routine service call. Complete parts a and b below.
E Click the icon to view the data.
....
a. Estimate the least squares regression equation.
The regression equation is y=() x.
(Round to two decimal places as needed.)
b. If a gymnasium had nine machiìnes, how many minutes should the company expect a routine service call to require.
A routine service call should require about minutes if there are nine machines.
(Round to the nearest minute as needed.)
- X
Cost of Small Projects Data
Number of
Machines
Service Time
(minutes)
12
115
65
80
10
9
85
50
60
65
40
7
9.
3
11
95
4
45
5
11
35
105
Print
Done
Transcribed Image Text:The management at a company that sells and services exercise equipment would like to determine if there is a relationship between the number of minutes required to complete a routine service call and the number of machines serviced. A random sample of 12 records revealed the information available below concerning the number of machines serviced and the time (in minutes) to complete the routine service call. Complete parts a and b below. E Click the icon to view the data. .... a. Estimate the least squares regression equation. The regression equation is y=() x. (Round to two decimal places as needed.) b. If a gymnasium had nine machiìnes, how many minutes should the company expect a routine service call to require. A routine service call should require about minutes if there are nine machines. (Round to the nearest minute as needed.) - X Cost of Small Projects Data Number of Machines Service Time (minutes) 12 115 65 80 10 9 85 50 60 65 40 7 9. 3 11 95 4 45 5 11 35 105 Print Done
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