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1. |
Which is the best prediction equation for the data? |
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A. |
y = 5x - 19,950 |
B. |
y = 10x - 19,950 |
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C. |
y = 25x - 19,950 |
D. |
y = 20x - 19,950 |
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Hint |
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2. |
Use a graphing calculator to find the equation of the regression line. |
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A. |
y = 23x - 21,000 |
B. |
y = 12x - 23,947 |
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C. |
y = 2x - 25 |
D. |
y = x - 576 |
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Hint |
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3. |
The math scores, x, and chemistry scores, y, for six students are given in the table. Use a graphing calculator to find the Pearson product-moment correlation. |
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A. |
about 0.65 |
B. |
about 0.74 |
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C. |
about 0.68 |
D. |
about 0.71 |
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Hint |
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4. |
Use two ordered pairs to write the equation of a best-fit line. |
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A. |
y = 5x |
B. |
y = 5x + 75 |
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C. |
y = 3x + 72 |
D. |
y = 3x |
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Hint |
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5. |
Ilene analyzed her test scores and determined the equation of the best-fit line was y = 4.25x + 72. Predict her score for the 5th test. |
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A. |
93.25 |
B. |
98.5 |
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C. |
72.5 |
D. |
88.75 |
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Hint |
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