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A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week. Suppose she knows that the standard deviation for hours spent per week by all UMKC students doing homework is 7. She allows the estimate to be within 1.5 hours of the population mean.
a) What is the maximum error of estimate she allows?
b) How large a sample should the researcher select so that the estimate will be within 1.5 hours of the population mean?
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
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A researcher is comparing two antihypertensive drugs A and B with regards to reduction of patient's systolic blood pressure (SBP). Baseline SBP is measured for two groups of patients.
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