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A researcher estimates the 95% CI for a sample with a mean of M = 3.26 and a standard error (?m) of 0.91. What is the upper confidence limit for this interval?
A) 1.48
B) 2.35
C) 4.17
D) 5.04
You want to prove that a population mean is not 7. Data is ratio and a large sample size will be used (n = 225). When the sample is done the sample mean is computed to be 7.2 and the sample standard deviation is 1.5.
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