BUSI1013 – Statistics for Business 8.The proportion of female customers in a recent satisfaction survey of 400 listeners for a Toronto radio station is found to be 0.54. (6 Points)a.Construct a 95% confidence interval for the population proportion of female listeners.(0.4912,0.588)b.What is the margin of error at the 90% level of confidence?0.040957(0.4990,0.5809)c.If another survey in planned for the radio station and the estimate from this survey can be used as the planning value, calculate the required sample size if the desired margin of error is 3% at the 95% confidence level.10619.120 of a random sample of 800 Ontario drivers admitted that in the last month they have used a smart phone while driving. This random sample is considered representative of Ontario drivers. (4 Points)a.Construct a 95% confidence interval to estimate the proportion of Ontario drivers whoused a smart phone while driving in the last month.(0.12526,0.17474)b.What is the margin of error of the estimate at the 99% confidence level?0.0325210.In a survey, the planning value for the population proportion is p* = 0.25. How large should the sample size for the survey be if the desired level of confidence is 90% and the desired margin of error is 0.04? (2 Points)318
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- Winter '15