Quiz 4.2a |
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Type of relationship |
Positive|negative |
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A. |
linear |
positive |
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B. |
linear |
negative |
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C. |
non-linear |
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D. |
non-linear |
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E. |
random |
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F. |
linear |
negative |
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Averages Su 02 (x) |
MS 150 (y) |
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63 |
79 |
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77 |
62 |
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78 |
62 |
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83 |
56 |
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72 |
60 |
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89 |
41 |
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-1.2836 |
1. Calculate the slope |
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158.84 |
2. Calculate the y-intercept |
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negative |
3. Positive or negative? |
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71.55 |
4. x=68 |
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86.35 |
5. y=48 |
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-0.9423 |
6. Determine r. |
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strong/high |
7. Level of corr |
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linear |
8. Linear? |
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0.8878 |
9. Coefficient of determination. |
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88.78% |
10. What % in the variation... |
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11. Inference? #2 |
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[probably not] |
12. In this case, is there causation? |
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[variable] |
13. Why or why not? |
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Observation: Those who once did |
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well, are now not doing well. |
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Those who once did poorly, are now |
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doing well. Food for thought? |
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