Mathematics, 19.07.2019 23:00 psitthibun

From a normally distributed population, a simple random sample of size 30 is taken. the mean of the sample is 144 and the standard deviation of the sample is 12. construct a 90% confidence interval for the population mean. a. (139.7, 148.3) b. (140.4, 147.6) c. (142.4, 145.6) d. (143.3, 144.7)

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