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madenaz123
02.03.2020 •
Mathematics
Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The X column indicates the number of client contacts last month and the Y column shows the value of sales ($ thousands) last month for each client sampled. Number of Contacts,x Sales ($ thousands),y14 24 23 30 12 14 48 90 20 28 50 85 16 30 55 120 46 80 50 110 Determine the regression equation.
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Ответ:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
Step-by-step explanation:
The data given on this case is:
x: 14,12,20,16,46,23,48,50,55,50
y: 24,24,28,30,80,30,90,85,120,110
For this case we need to calculate the slope with the following formula:
Where:
So we can find the sums like this:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
Ответ: