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4. With reference to the previous problem, what can we say with 95% confidence about the...
1. In a random sample of 400 eligible voters interviewed in a large county, 228 objected...
1. In a random sample of 400 eligible voters interviewed in a large county, 228 objected to the use of public funds for the construction of a new professional football stadium. Construct a 95% confidence interval for the corresponding proportion of eligible voters in the whole county 2. With reference to the previous problem, what can we say with 99% confidence about the maximum error if- = is used as an estimate of the proportion of all eligible voters 7...
To estimate the proportion of voters, you want to construct a 95% confidence interval for the...
To estimate the proportion of voters, you want to construct a 95% confidence interval for the population proportion with maximum error 0.052. How large a sample must be taken?
8. (9 pts) Suppose that we want to construct a 95% confidence interval to estimate the...
8. (9 pts) Suppose that we want to construct a 95% confidence interval to estimate the percentage of voters who would vote a candidate. We suggest that approximately 46% would vote for the candidate. Suppose that we want the margin of error for the confidence interval is no more than 1%. Determine how large the sample size should be.
We want to construct a 95% confidence interval for the true proportion of all adult males...
We want to construct a 95% confidence interval for the true proportion of all adult males who have spent time in prison, with a margin of error of 0.02. From previous studies, we believe the proportion to be somewhere around 0.07. The required sample size is, therefore: Select one: a. 620 b. 626 c. 632 d. 670
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of...
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of the following statements would be correct? A. We expect that 95% of the intervals so constructed would contain the true population mean. B. We are 95% sure that the true population mean lies either within the constructed interval or outside the constructed interval. C. Taking 100 samples of the same size, and constructing a new confidence interval from each sample, would yield five intervals...
When we want confidence and use the conservative estimate of 95%, we can use the simple...
When we want confidence and use the conservative estimate of 95%, we can use the simple formula to roughly determine the sample size needed for a given margin of error p=.05. Use this formula to determine the sample size needed for a margin of error of 0.01 .
What proportion of adults like pineapple as a pizza topping? A 95% confidence interval for the...
What proportion of adults like pineapple as a pizza topping? A 95% confidence interval for the proportion of adults who say they like pineapple on their pizza was constructed and it was found to be from 0.14 to 0.20. Based on this interval, we know the margin of error must be 0.02. 0.03 It's impossible to answer this question without more information. O 0.06. O 0.05.
Need help with 3C. Thank you! In a survey of 990 Canadian adults, 790 say that...
Need help with 3C. Thank you!
In a survey of 990 Canadian adults, 790 say that the energy situation in Canada is very or fairly serious. 1. Find the point estimate for the population proportion. 0.7980 You are correct. Previous Tries Your receipt no. is 168-9466 2. Construct a 95% confidence interval for the population proportion. (a) The critical value: 1.9600 You are correct. Your receipt no. is 168-1602 Previous Tries (b) The margin of error: 0.0250 You are correct....
a. Assume that a sample is used to estimate a population proportion p. Find the 95%...
a. Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 198 with 42 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 95% C.I. = b. A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 0.5% margin of error at a 99% confidence...
We intend to estimate the average driving time of Chicago commuters. From a previous study, we...
We intend to estimate the average driving time of Chicago commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation (o) of 6 minutes. our 99 percent confidence interval to have a margin of error of no more than plus or minus 2 minutes. What is the smallest sample size that we should consider? We want O 120 O 12 60 08
1. In a random sample of 400 eligible voters interviewed in a large county, 228 objected to the use of public funds for the construction of a new professional football stadium. Construct a 95% confidence interval for the corresponding proportion of eligible voters in the whole county 2. With reference to the previous problem, what can we say with 99% confidence about the maximum error if- = is used as an estimate of the proportion of all eligible voters 7...
What proportion of adults like pineapple as a pizza topping? A 95% confidence interval for the proportion of adults who say they like pineapple on their pizza was constructed and it was found to be from 0.14 to 0.20. Based on this interval, we know the margin of error must be 0.02. 0.03 It's impossible to answer this question without more information. O 0.06. O 0.05.
Need help with 3C. Thank you!
In a survey of 990 Canadian adults, 790 say that the energy situation in Canada is very or fairly serious. 1. Find the point estimate for the population proportion. 0.7980 You are correct. Previous Tries Your receipt no. is 168-9466 2. Construct a 95% confidence interval for the population proportion. (a) The critical value: 1.9600 You are correct. Your receipt no. is 168-1602 Previous Tries (b) The margin of error: 0.0250 You are correct....
We intend to estimate the average driving time of Chicago commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation (o) of 6 minutes. our 99 percent confidence interval to have a margin of error of no more than plus or minus 2 minutes. What is the smallest sample size that we should consider? We want O 120 O 12 60 08
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