A political pollster claims that 55% of voters prefer candidate A. To investigate this claim, a random sample of 75 voters is polled. The pollster finds that 39 of those polled prefer candidate A. He would like to know if the data provide convincing evidence that the true proportion of all voters who prefer candidate A is less than 55%. What are the values of the test statistic and P-value for this test? Find the z-table here. z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.52 (1 minus 0.52) Over 75 EndFraction EndEndFraction, p-value = 0.3015 z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.52 (1 minus 0.52) Over 75 EndFraction EndEndFraction, p-value = 0.6030 z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.55 (1 minus 0.55) Over 75 EndFraction EndEndFraction, p-value = 0.3015 z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.55 (1 minus 0.55) Over 75 EndFractio
A political pollster claims that 55% of voters prefer candidate A. To investigate this claim, a random sample of 75 voters is polled. The pollster finds that 39 of those polled prefer candidate A. He would like to know if the data provide convincing evidence that the true proportion of all voters who prefer candidate A is less than 55%. What are the values of the test statistic and P-value for this test?
Find the z-table here.
z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.52 (1 minus 0.52) Over 75 EndFraction EndEndFraction, p-value = 0.3015
z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.52 (1 minus 0.52) Over 75 EndFraction EndEndFraction, p-value = 0.6030
z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.55 (1 minus 0.55) Over 75 EndFraction EndEndFraction, p-value = 0.3015
z = StartStartFraction 0.52 minus 0.55 OverOver StartRoot StartFraction 0.55 (1 minus 0.55) Over 75 EndFraction EndEndFraction, p-value = 0.6030
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