Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. Tinterval (13.046.22.15) 17.598 Sx 16 01712719 n= 50 a. Express the confidence interval in the format that uses the "less than" symbol. Given that the original listed data use one decimal place, round the confidence interval limits accordingly O Mbps

7.1.13 Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 1087 and x = 540 who said "yes." Use a 90% confidence level. Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer. 3 parts remaining Clear All 3 F7 F8

A report included the following information on the heights (in.) for non-Hispanic white females. Age SampleSize SampleMean Std. ErrorMean 20–39 864 63.9 0.09 60 and older 936 62.2 0.11 (a) Calculate a confidence interval at confidence level approximately 95% for the difference between population mean height for the younger women and that for the older women. (Use ?20–39 − ?60 and older.)     ,     Interpret the interval. We are 95% confident that the true average height of younger women is greater than that of older women by an amount within the confidence interval.We are 95% confident that the true average height of younger women is greater than that of older women by an amount outside the confidence interval.    We cannot draw a conclusion from the given information.We are 95% confident that the true average height of younger women is less than that of older women by an amount within the confidence interval. (b) Let  ?1  denote the population mean…

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