Conduct statistical investigations.
Example Problems
In a study of college freshmen, researchers found that students who watched TV for an hour or more on weeknights were significantly more likely to have high blood pressure, compared to those students who watched less than an hour of TV on weeknights.
Does this mean that watching more TV raises one's blood pressure? Explain your reasoning.
Does this mean that watching more TV raises one's blood pressure? Explain your reasoning.
A high school basketball player made of her free throws last season. Over the summer, she worked with a new coach and wanted to test if her free throw percentage had improved. She tracked a random sample of her free throws this season to see what proportion she made.
State the alternative hypothesis, , for this test.
State the alternative hypothesis, , for this test.
At a high school, of students ordered a yearbook last year. The yearbook staff redesigned the cover and wanted to test if the proportion of students ordering one had increased. They took a random sample of students to see what proportion of them had ordered a yearbook.
State the alternative hypothesis, , for this test.
State the alternative hypothesis, , for this test.
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