Calculations

All the calculations 1-7 must be done with Excel.

Consider the following data from a small bookstore.

Number of sales people working—————–Sales (in $1000)

2————————————————————–10

3————————————————————–11

7————————————————————–13

9————————————————————–14

10————————————————————-18

10————————————————————-20

12————————————————————-20

15————————————————————-22

16————————————————————-22

20————————————————————-26

x = 10.4—————————————————–y = 17.6

SD(x) = 5.64———————————————–SD(y) = 5.34

1. Calculate the mean and standard deviation of # of sales people (x) and sales (y). Find sample size n.

2. Calculate the correlation coefficient with all three methods (covariance method, z-score method, and correlation tool in Excel).

3. Find b0 and b1 for the linear regression model with all three methods (two different formulas and Solver). Interpret the meaning of b1 of this linear regression model.

4. Calculate Se and SST.

5. Calculate R square with both methods (correlation coefficient method and the formula r square = 1 – SSE/SST). Interpret the meaning of R square of this linear regression model.

6. Use Regression tool in Excel to find b0, b1, SSE, SST, r, R square, and Se.

7. Estimate the sales if the number of sales people working is 8, 13, and 19, respectively.

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Calculations

All the calculations 1-7 must be done with Excel.

Consider the following data from a small bookstore.

Number of sales people working—————–Sales (in $1000)

2————————————————————–10

3————————————————————–11

7————————————————————–13

9————————————————————–14

10————————————————————-18

10————————————————————-20

12————————————————————-20

15————————————————————-22

16————————————————————-22

20————————————————————-26

x = 10.4—————————————————–y = 17.6

SD(x) = 5.64———————————————–SD(y) = 5.34

1. Calculate the mean and standard deviation of # of sales people (x) and sales (y). Find sample size n.

2. Calculate the correlation coefficient with all three methods (covariance method, z-score method, and correlation tool in Excel).

3. Find b0 and b1 for the linear regression model with all three methods (two different formulas and Solver). Interpret the meaning of b1 of this linear regression model.

4. Calculate Se and SST.

5. Calculate R square with both methods (correlation coefficient method and the formula r square = 1 – SSE/SST). Interpret the meaning of R square of this linear regression model.

6. Use Regression tool in Excel to find b0, b1, SSE, SST, r, R square, and Se.

7. Estimate the sales if the number of sales people working is 8, 13, and 19, respectively.

Just in case you need an assignment done, hire us. Using our writing services will make your life easier because we deliver exceptional results. Use us to get an A!

We are the Best!

course-preview

275 words per page

You essay will be 275 words per page. Tell your writer how many words you need, or the pages.


12 pt Times New Roman

Unless otherwise stated, we use 12pt Arial/Times New Roman as the font for your paper.


Double line spacing

Your essay will have double spaced text. View our sample essays.


Any citation style

APA, MLA, Chicago/Turabian, Harvard, our writers are experts at formatting.


We Accept

Secure Payment
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