In: Statistics and Probability
Listed below is a company’s sales in Year 1 through Year 12 along with the national income of the country, where the business is set up.
Year |
National Income (in millions of dollars) x |
Company's sales (in thousands of dollars) y |
Year 1 |
305 |
470 |
Year 2 |
316 |
485 |
Year 3 |
358 |
499 |
Year 4 |
350 |
515 |
Year 5 |
375 |
532 |
Year 6 |
392 |
532 |
Year 7 |
400 |
556 |
Year 8 |
398 |
576 |
Year 9 |
430 |
583 |
Year 10 |
456 |
587 |
Year 11 |
578 |
601 |
Year 12 |
498 |
605 |
a. Develop a scatter chart for the above data. What does this
chart indicate about the relationship between the national income
and the company's sales in Year 1 through Year 12?
b. Use the data to develop an estimated regression equation that
could be used to estimate the company’s sales based on the national
income. What is the estimated regression model?