97% and 90% Confidence Intervals
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Survey of 60 showed the sample mean is 2.76 and the standard deviation is 0.75. Construct a confidence interval of 90 and 97% for the population mean.
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Neat and systematic solution provided that determines the 97% and 90% confidence intervals.
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N = 60, M = 2.76, SD = 0.75
SE = SD/sqrt N = 0.75/sqrt 60 = 0.097
(a) The 97% CI for ...
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