What is -2(a+b)= -2a - 2b
1 answer:
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Answer:
n=5
And in order to calculate the correlation coefficient we can use this formula:
So then the correlation coefficient would be r =0.9877
And the determination coefficient for this case would be:
And the correct option for this case would be:
A. The value of Upper R squared is 97.57%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.
Step-by-step explanation:
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
For this case we have the following data:
N. sal. peop. work. Sales (in $1000)
2 10
3 12
6 14
8 15
10 17
10 19
11 19
16 23
17 23
20 25
We assume that the Number of Sales represent (X) and Sales (in $1000) represent (Y), we have this:
n=5
And in order to calculate the correlation coefficient we can use this formula:
So then the correlation coefficient would be r =0.9877
And the determination coefficient for this case would be:
And the correct option for this case would be:
A. The value of Upper R squared is 97.57%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.