A random sample of 20 items is selected from a population. The sample yields a mean of 22.8 and a standard deviation of 3.4. Determine a 95% confidence interval for the population mean. A. 21.31 to 24.29 B. 21.21 to 24.39 C. 21.55 to 24.05 D. 21.48 to 24.12
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A random sample of 20 items is selected from a population. The sample yields a
A. 21.31 to 24.29
B. 21.21 to 24.39
C. 21.55 to 24.05
D. 21.48 to 24.12
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