Question 1
Consider the following pairs of observations:
| a. | Construct a scattergram for the data. Does the scattergram suggest that y is positively linearly |
related to
x?
| b. | Find the slope of the least squares line for the data and test whether the data provide sufficient |
evidence that
y is positively linearly related to
x. Use
α = .05.
Question 2
A realtor collected the following data for a random sample of ten homes that recently sold in her area.
| House | Asking Price | Days on Market |
| A | $114,500 | 29 |
| B | $149,900 | 16 |
| C | $154,700 | 59 |
| D | $159,900 | 42 |
| E | $160,000 | 72 |
| F | $165,900 | 45 |
| G | $169,700 | 12 |
| H | $171,900 | 39 |
| I | $175,000 | 81 |
| J | $289,900 | 121 |
| a. | Construct a scattergram for the data. |
| b. | Find the least squares line for the data and plot the line on your scattergram. |
c.
Test whether the number of days on the market,
y, is positively linearly related to the asking price,
x. Use
tree-ring data
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