Scatterplot and percent table
qngr222999
crj526_m7_scatterplothw.docScatterplot / correlation homework problems
Unless you are fluent in Excel, or can figure out another way to create scatterplots, you need not send them with your Nulls, Alts & Conclusions to these problems. Keep them and when I send the answers, you will be able to determine if your scatterplots resembled mine.
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NOTE: when constructing scatterplots, "X" is the first (left most) column of numbers |
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as in↓↓ |
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X |
Y |
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1) |
A statistics professor had tried several methods of assessing |
T-F |
Problems |
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proficiency. After a while, he began to believe that true-false |
4.8 |
4.5 |
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tests were as good as tests full of problems for this purpose. |
4.0 |
4.7 |
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So he gave one of his classes both types of tests covering |
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2.5 |
2.0 |
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the same material. What happened? |
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1.0 |
1.2 |
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1.6 |
1.2 |
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Write the Null, Alt, construct the scatterplot & write the conclusion. |
2.1 |
1.5 |
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2.3 |
2.5 |
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1.9 |
1.6 |
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3.5 |
3.0 |
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3.2 |
3.2 |
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2) |
Did the prostitute's income decrease with the number of times they |
# Arrests |
Income |
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they were arrested? Data were taken over a 3 month period |
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4 |
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and income was rounded to the nearest thousand. |
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2 |
6 |
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4 |
4 |
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Write the Null, Alt, construct the scatterplot & write the conclusion. |
8 |
4 |
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10 |
2 |
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9 |
3 |
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11 |
2 |
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14 |
1 |
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