The mean lifetime for cardiac stents is 8.7 years. A medical device company has implemented some improvements in the manufacturing process and hypothesizes that the lifetime is now longer. A study of 100 new devices reveals a mean lifetime of 9.3 years with a standard deviation of 3.8 years. Is there statistical evidence of a prolonged lifetime of the stents? What is the appropriate test statistic? What is the decision rule value if the level of significance is .05—Reject H0 if z ≥ ______ What is the value of your test statistic (z)? (round to 2 decimal places)
The mean lifetime for cardiac stents is 8.7 years. A medical device company has implemented some improvements in the manufacturing process and hypothesizes that the lifetime is now longer. A study of 100 new devices reveals a mean lifetime of 9.3 years with a standard deviation of 3.8 years. Is there statistical evidence of a prolonged lifetime of the stents? What is the appropriate test statistic? What is the decision rule value if the level of significance is .05—Reject H0 if z ≥ ______ What is the value of your test statistic (z)? (round to 2 decimal places)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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mean lifetime for cardiac stents is 8.7 years. A medical device company has implemented some improvements in the manufacturing process and hypothesizes that the lifetime is now longer. A study of 100 new devices reveals a mean lifetime of 9.3 years with a standard deviation of 3.8 years. Is there statistical evidence of a prolonged lifetime of the stents?- What is the appropriate test statistic?
- What is the decision rule value if the level of significance is .05—Reject H0 if z ≥ ______
- What is the value of your test statistic (z)? (round to 2 decimal places)
- What is the conclusion of your hypothesis test?
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