exam 3.docx

# exam 3.docx - Question 1 20 20 pts Suppose you were...

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Question 1 20 / 20 pts Suppose you were commissioned to deal with the value highlighted below; determine the most appropriate null hypothesis. LOS ANGELES—Revealing that the success of such relationships is far less certain than typically assumed, a report released Wednesday by UCLA’s Department of Sociology found that only 40 percent of celebrities ultimately end up marrying their stalkers. : : : : : : : :

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Question 2 20 / 20 pts Michael Larson of Press Your Luck went 45ish "spins" without getting whammied. Because it was __________ that luck alone could account for this event, the decision to __________ the __________ hypothesis and conclude statistical significance was justified. unlikely; accept; null unlikely; reject; null likely; reject; alternative unlikely; reject; alternative likely; accept; alternative likely; reject; null
unlikely; accept; alternative likely; accept; null Question 3 20 / 20 pts Suppose three significance tests (A, B and C) were performed. For A the sample size is 4. For B the sample size is 100. For C the sample size is 4,000,000. Holding other factors constant, which would be most likely to find a significant difference? Test A Test C Test B Question 4 20 / 20 pts A type I error occurs when we find statistical significance when really there was none. In other words...

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None of the above. The sample statistic was not misleading. A calculation error occurred. All of the above. The sample statistic was misleading. Question 5 20 / 20 pts Suppose we had the following hypothesis test and resulting P-value. : : Based on this information, make a decision while providing the correct reasoning.
Reject the null hypothesis. The probability under the assumption there is no difference between p and blah blah

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• Spring '07
• JaneWaterman,PamelaThomas

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