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Consider a poll that reported that 49% of people from a certain region have tried marijuana The survey polled 983 adults from the region and
Consider a poll that reported that 49% of people from a certain region have tried marijuana The survey polled 983 adults from the region and had a margin of error of plus or minus 6 percentage points with a 90% level of confidence. Complete parts (a) through (c) below. a. State the survey results in confidence interval form and interpret the interval. The confidence interval of the survey results is (Round to two decimal places as needed.) Interpret the interval. Choose the correct answer below. O A. 90% of the 983 people from the region that were polled fell within the confidence interval. O B. There is a 90% chance that the percentage of people in the region who have tried marijuana is within the confidence interval. O C. The confidence interval will contain the percentage of people in the region who have tried marijuana 90% of the time. O D. We are 90% confident that the percentage of people in the region who have tried marijuana is within the confidence interval.Consider a poll that reported that 49% of people from a certain region have tried marijuana The survey polled 983 adults from the region and had a margin of error of plus or minus 6 percentage points with a 90% level of confidence. Complete parts (a) through (c) below. b. It the polling company was to conduct 200 such surveys of 983 people from the region, how many of them would result in confidence intervals that did not include the true population proportion? Approximately of the confidence intervals would not include the true population proportion. c. Suppose a student wrote this interpretation of the interval: "We are 90% confident that the percentage of people from this region who have tried marijuana is within the confidence interval." What, if anything, is incorrect in this interpretation? A. This interpretation is incorrect because the confidence level represents how often the confidence interval will contain the correct population proportion. O B. This interpretation is incorrect because a confidence interval is about a population not a sample. O C. This interpretation is incorrect because the confidence level states the probability that the sample proportion is within the confidence interval.K Consider a poll that reported that 49% of people from a certain region have tried marijuana The survey polled 983 adults from the region and had a margin of error of plus or minus 6 percentage points with a 90% level of confidence. Complete parts (a) through (c) below. population proportion? Approximately of the confidence intervals would not include the true population proportion. c. Suppose a student wrote this interpretation of the interval: "We are 90% confident that the percentage of people from this region who have tried marijuana is within the confidence interval." What, if anything, is incorrect in this interpretation? O A. This interpretation is incorrect because the confidence level represents how often the confidence interval will contain the correct population proportion. O B. This interpretation is incorrect because a confidence interval is about a population not a sample. O C. This interpretation is incorrect because the confidence level states the probability that the sample proportion is within the confidence interval. O D. There is nothing wrong with this interpretation
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