A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.02 with 959% confde (a) she uses a previous estimate of 0.34? (b) she does not use any prior estimates? Click the icon to view the table of critical values. (a) n= (Round up to the nearest integer.) (b) n = (Round up to the nearest integer.)

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a survey of 1000 large corporations, 242 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job. (a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 0.95 confidence interval for p. (Round your answers to three decimal places.) lower limit       upper limit       (c) As a news writer, how would you report the survey results regarding the proportion of corporations that would hire the equally qualified nonsmoker? Report p̂.Report the margin of error.    Report p̂ along with the margin of error. What is the margin of error based on a 95% confidence interval? (Round your answer to three decimal places.)

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 584 potsherds was found, of which 355 were identified as Santa Fe black-on-white. (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit       upper limit       Give a brief statement of the meaning of the confidence interval. 95% of all confidence intervals would include the true proportion of potsherds.5% of all confidence intervals would include the true proportion of potsherds.    5% of the confidence intervals created using this method would include the true proportion of potsherds.95% of the…

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 984 supermarket shoppers revealed that 274 always stock up on an item when they find that item at a real bargain price. (a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.) (b) Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.) lower limit  =    upper limit   =    Give a brief explanation of the meaning of the interval.   a.) We are 95% confident that the true proportion of shoppers who stock up on bargains falls within this interval. b.) We are 5% confident that the true proportion of shoppers who stock up on bargains falls above this interval.     c.) We are 95% confident that the true…