Question

Suppose a poll of 9,008 adults taken in 1996 found that 9% held a particular religious belief, whereas a poll of 1,000 adults taken in 2007 found that 29% held that belief. (a) Assuming a proper random sample was used, verify that the sample proportion for the poll taken in 1996 almost • certainly represents the population proportion to within about 1%. (Round your answers to three decimal places, when necessary.) The standard deviation for the possible sample proportions is approximately We know that almost all of the sample proportions are likely to be within three standard deviations of the true proportion. Since three standard deviations is less than 1% , we can verify that the sample proportion for the poll almost certainly represents the population proportion to within about 1%.

Answer 1

Answer: (C) stand and deviation JPCI-P) 0.09(1-0-09) 9.00% 0.00301 0.003 ✓