[Solved] The following data list worldwide shipments of personal computers (1,000) according to Dataquest. Plot the data, fit a trend line, and discuss
Question: The following data list worldwide shipments of personal computers (1,000) according to Dataquest. Plot the data, fit a trend line, and discuss the strength of prediction of the regression model. In addition, explore a quadratic trend. Compare the results of the two models.
Hint for question: Compare the errors on the basis of the Mean Absolute Deviation (MAD)?
Copy and paste the following data set in Excel to save the typing effort and possible mistakes in data entry.
| Year | Shipments |
| 1985 | 14,705 |
| 1986 | 15,064 |
| 1987 | 16,676 |
| 1988 | 18,061 |
| 1989 | 21,327 |
| 1990 | 23,738 |
| 1991 | 26,966 |
| 1992 | 32,411 |
| 1993 | 38,851 |
| 1994 | 47,894 |
| 1995 | 60,171 |
| 1996 | 71,065 |
| 1997 | 82,400 |
| 1998 | 97,321 |
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