6 Practice Questions

6 Practice Questions - BUAD 310 Applied Business Statistics...

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BUAD 310 Applied Business Statistics In-Class Practice 10/6/10 Chi-Square Table 2
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According to the Bureau of the Census, 19.0% of the U.S. population lives in the Northeast, 22.9% in the Midwest, 35.6% in the South, and 22.5% in the West. In a random sample of 200 recent calls to a national 800-number hotline, 39 of the calls were from the Northeast, 55 from the Midwest, 60 from the South, and 46 from the West. Could the geographical distribution of hotline callers be the same as the U.S. population distribution? E NE = E MW = E S = E W = 3 Region Population Distribution 200 Callers: observed counts 200 Callers: expected counts NE MW S W NE MW S W H 0 : vs H a : 4 Conclusion:
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Approximately 13.5% of U.S. drivers are younger than age 25, with 41.4% in the 25-44 age group, and 45.1% in the 45-and-over category. For a random sample of 200 fatal accidents in her state, a safety expert finds that 42 drivers were under 25 years old, 80 were 25-44 years old, and 78 were at least 45 years old. At the 5% level,
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This note was uploaded on 11/30/2010 for the course BUAD 310 at USC.

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6 Practice Questions - BUAD 310 Applied Business Statistics...

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