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Mathematics, 07.03.2020 05:40 blackbetty79
A random sample of n measurements was selected from a population with unknown mean muμ and standard deviation sigmaσ. Calculate a95% confidence interval for muμ for each of the following situations. Complete parts a through e. a. n=75, x overbar=28, s^2=12 (Round to the nearest thousandth as needed.)b. n=225, x overbar=115, s^2=23 (Round to the nearest thousandth as needed.)c. n=105, x overbar=14, s=0.30 (Round to the nearest thousandth as needed.)d. n=105, x overbar =4.14, s=0.83 (Round to the nearest thousandth as needed.)e. Is the assumption that the underlying population of measurements is normally distributed necessary to ensure the validity of the confidence intervals in parts aminus−d? Yes No
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