The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 68.8 for a sample of size 27 and standard deviation 7.4. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level). Assume the data is from a normally distributed population. Enter your answer as a tri-linear inequality accurate to three decimal places.
____ < μ < ____
sample mean = 68.8
n = 27
sd = 7.4
t value for 99% CI = TINV( 0.01, 26) = 2.779
CI = mean +/- E = 68.8 +/- 3.957
CI = 64.843 , 72.757
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the...
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