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The National Center for Health Statistics recently released a report that stated 70% of adults do not exercise regularly. A researcher decided to test whether the results on a state-by-state basis differed from the 70% reported by the National Center for Health Statistics at the 5% significance level. The researcher took a sample of 350 adults in Wisconsin and found that 252 of the 350 indicated that they didn't exercise regularly.
A. State the null and alternate hypotheses.
B. Identify the test statistic
C. State the decision rule.
D. Show the appropriate calculations and state the statistical decision.
E. What conclusions can you draw concerning the exercise rate of the people surveyed in Wisconsin?
1. A researcher was interested lowering the high school dropout level in his county. He measured the reading level of students entering middle school (based on a standard test) and
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The poll interviewed 1500 persons rather than 1060, for 95% confidence.
when is mode illdefined
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1. A researcher is comparing two middle school 7th grade classes. One class at one school has participated in an arts program (involving putting on a musical play) which emphasized
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