A sample of 19 joint specimens of a particular type provided a sample mean proportional limit stress of 8.55 MPa and a sample standard deviation of 0.72 MPa.**(a) Calculate and interpret a 95% lower confidence bound for the true average proportional limit stress of all such joints. (Round your answer to two decimal places.)**Lower confidence bound: **8.26 MPa** ✔️**Interpret this bound:**- With 95% confidence, we can say that the value of the true mean proportional limit stress of all such joints is greater than this value. ✔️**What, if any, assumptions did you make about the distribution of proportional limit stress?**- We must assume that the sample observations were taken from a normally distributed population. ✔️**(b) Calculate and interpret a 95% lower prediction bound for proportional limit stress of a single joint of this type. (Round your answer to two decimal places.)**Lower prediction bound: **7.24 MPa** ❌

From given data we have : n=19 x=8.55 s=0.72

Answered: A sample of 19 joint specimens of a…

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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