The following summary data on bending strength (lb-in/in) of joints is taken from the article Bending Strength
Question:
The following summary data on bending strength (lb-in/in)
of joints is taken from the article “Bending Strength of Corner Joints Constructed with Injection Molded Splines”
(Forest Products J., April, 1997: 89–92).
Sample Sample Sample Type Size Mean SD Without side coating 10 80.95 9.59 With side coating 10 63.23 5.96
a. Calculate a 95% lower confidence bound for true average strength of joints with a side coating.
b. Calculate a 95% lower prediction bound for the strength of a single joint with a side coating.
c. Calculate an interval that, with 95% confidence, includes the strength values for at least 95% of the population of all joints with side coatings.
d. Calculate a 95% confidence interval for the difference between true average strengths for the two types of joints.
Step by Step Answer:
Probability And Statistics For Engineering And The Sciences
ISBN: 9781111802325
7th Edition
Authors: Dave Ellis, Jay L Devore