Please solve questions 7,8 and 9.
7. [14 Points] ASWSBE14 8.E.034. MYNOTES I ASKYOURTEACHER l PRACTICEANOTHER I You may need to use the appropriate appendix table or technology to answer this question. At 95% condence, how large a sample should be taken to obtain a margin of error of 0.05 for the estimation of a population proportion? Assume that past data are not available for developing a planning value for ,0\". (Round your answer up to the nearest whole number.) Need Help? a. [112 Points] ASWSBE14 8.E.035.M|. ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1,007 adults to learn about their major healthcare concerns. The survey results showed that 583 of the respondents lack condence they will be able to afford health insurance in the future. (a) What is the point estimate of the population proportion of adults who lack condence they will be able to afford health insurance in the future. (Round your answer to two decimal places.) E (b) At 90% condence, what is the margin of error? (Round your answer to four decimal places.) : (c) Develop a 90% condence interval for the population proportion of adults who lack confidence they will be able to afford health insurance in the future. (Round your answer to four decimal places.) hps:waw.webeasign.nereb/StudenifAssignrnenI-Responsesasl7d3p=29660757m1 416 10f30i22. 8.12 PM Ch. 3: Condence Intervals (F) - ECN 221 - SLN 94910, section 94910. Fall 2022 | WebAssign :m: (d) Develop a 95% condence interval for this population proportion. (Round your answer to four decimal places.) |:lto:l Need Help? "El 9. [18 Points] MY NOTES | ASK YOUR TEACHER | PRACTICE ANOTHER I You may need to use the appropriate appendix table or technology to answer this question. ASWSBE14 8.E.049.MI. A survey conducted by the American Automobile Association showed that a family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls resulted in a sample mean of $256.45 per day and a sample standard deviation of $78.50. (a) Develop a 95% condence interval estimate of the mean amount spent per day in dollars by a family of four visiting Niagara Falls. (Round your answers to the nearest cent.) $|:lto$:l (b) Based on the confidence interval from part (a), does it appear that the population mean amount spent per day by families visiting Niagara Falls differs from the mean reported by the American Automobile AssoCiation? Explain. 0 Yes. The upper limit for the confidence interval for the population mean at Niagara Falls is less than overall average daily vacation expenditure of $215.60 per day. This suggests the population mean at Niagara Falls is less than the overall average. C} No. The overall average daily vacation expenditure of $215.60 per day is between the upper and lower limits of the confidence interval for the population mean at Niagara Falls. This suggests we cannot determine if the population mean at Niagara Falls is greater than the overall average daily vacation expenditure. 0 Yes. The lower limit for the confidence interval for the population mean at Niagara Falls is greater than overall average daily vacation expenditure of $215.60 per day. This suggests the population mean at Niagara Falls is greater than the overall average. D Yes. The overall average daily vacation expenditure of $215.60 per day is between the upper and lower limits of the confidence interval for the population mean at Niagara Falls. This suggests the population mean at Niagara Falls is less than the overall average. 0 No. The lower limit for the confidence interval for the population mean at Niagara Falls is greater than overall average daily vacation expenditure of $215.60 per day. This suggests we cannot determine if the population mean at Niagara Falls is greater than the overall average daily vacation expenditure
