SOLUTION: The mean diastolic blood pressure for a random sample of 50 people was 98 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 10

Algebra ->  Probability-and-statistics -> SOLUTION: The mean diastolic blood pressure for a random sample of 50 people was 98 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 10       Log On


   

Question 1182283: The mean diastolic blood pressure for a random sample of 50 people was 98 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 10 millimeters of mercury, find a 95% confidence interval for the true mean diastolic blood pressure of all people. Then give its lower limit and upper limit.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)
Lower limit:

Upper limit:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
95% half-interval is z(0.975*sigma/sart(n)
=1.96*10/sqrt(50)
=2.77
the interval is (95.23, 100.77) mm Hg