Need Answer (by 11:00 P.M. EST). Thank you. METHODS AND APPLICATIONS On February

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Need Answer (by 11:00 P.M. EST). Thank you.

METHODS AND APPLICATIONS On February 8, 2002, the Gallup Organization released the results of a poll concerning American attitudes toward the 19th Winter Olympic Games in Salt Lake City, Utah. The poll results were based on telephone interviews with a randomly selected national sample of 1,010 adults, 18 years and older, conducted February 4-6, 2002. Suppose we wish to use the poll's results to justify the claim that more than 28 percent of Americans (18 years or older) say that figure skating is their favorite Winter Olympic event. The poll actually found that 30 percent of a sample of 1,010 respondents reported that figure skating was their favorite event. If, for the sake of argument, we assume that 28 percent of Americans (18 years or older) say figure skating is their favorite event (that is, p =.28), calculate the probability of observing a sample proportion of.30 or more; that is, calculate P(p Greaterthanorequalto 30). (Round standard deviation and probability answers to 4 decimal places. Round z-values to 2 decimal places.)

Explanation / Answer

miu = 0.28

SD = srqt ( 0.28*0.72 / 1010 ) = 0.0141

P( z > 0.30 - 0.28 / 0.0141 )

P( z > 1.42 ) = 0.0778

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