Consider a group of 27 patients in an experiment who received a placebo. At the beginning of the study, the researchers measured the seated systolic blood pressure of these 27 patients. The sample mean was 114.9 and the sample standard deviation was 9.3.
A. (111.3, 118.5)
B. (113.2, 116.6)
C. (114.2, 115.6)
D. (112.3, 117.5)
Answer: A. (111.3, 118.5)
Find a 95% confidence interval for the mean blood pressure of the population from which the patients were recruited.
A. (111.3, 118.5)
B. (113.2, 116.6)
C. (114.2, 115.6)
D. (112.3, 117.5)
Answer: A. (111.3, 118.5)
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