The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that average the reduction in systolic blood pressure is 17.9 sample of size 28 and standard deviation 11.3.

Question

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 < 

Answer 1

 12.399< μ < 23.401