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Mr. Mason’s Cruel Experiment (or Mason’s version of the scientific method…) 8.30.12
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1. First step of any scientific investigation?
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1. Observation
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Some students do better in school than others
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1. Observation Some students do better in school than others The students who do better also do more homework (positive correlation)
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2.
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2. Hypothesis More homework leads to higher student achievement
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2. Hypothesis More homework leads to higher student achievement – Do not use phrases like “I think…” State your hypothesis as a positive statement, as though it is fact.
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3.
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3. Design experiment and do research Have others already studied this relationship? If so, how did they do it?
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3. Design experiment and do research Have others already studied this relationship? If so, how did they do it? How do you measure student achievement? – Final grades? Test scores? Future jobs/income?
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3. Design experiment and do research Have others already studied this relationship? If so, how did they do it? How do you measure student achievement? – Final grades? Test scores? Future jobs/income? Vary levels of treatment – Some with normal amount, some with a lot
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3. Design experiment and do research Have others already studied this relationship? If so, how did they do it? How do you measure student achievement? – Final grades? Test scores? Future jobs/income? Vary levels of treatment – Some with normal amount, some with a lot Test null hypothesis – Give one class no homework at all
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3. Design experiment and do research Have others already studied this relationship? If so, how did they do it? How do you measure student achievement? – Final grades? Test scores? Future jobs/income? Vary levels of treatment – Some with normal amount, some with a lot Test null hypothesis – Give one class no homework at all Keep all other variables constant
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4. Do the experiment
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5. Analyze data
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6. Conclusion and replication See if any conclusions can be drawn from data If it can, do the experiment again to make sure that results are consistent
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7. Communication
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8. Verification Have other scientists do your experiment. Results and conclusions are only considered valid if other people get the same results.
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