Pull-strength tests on 10 soldered leads for a semi-conductor device yield the following results in pounds force required to rupture the bond: 19.8, 12.7, 13.2, 16.9, 10.6, 18.8, 11.1, 14.3, 17.0, 12.5. Another set of 8 leads was tested after encapsulation to determine whether the pull-strength has been increased by encapsulation of the device, with the following results: 24.9, 22.8, 23.6, 22.1, 20.4, 21.6, 21.8, 22.5. Has the device encapsulation increased the mean pull-strength? Test using a = 0.05 and report the p-value.
Pull-strength tests on 10 soldered leads for a semi-conductor device yield the following results in pounds force required to rupture the bond: 19.8, 12.7, 13.2, 16.9, 10.6, 18.8, 11.1, 14.3, 17.0, 12.5. Another set of 8 leads was tested after encapsulation to determine whether the pull-strength has been increased by encapsulation of the device, with the following results: 24.9, 22.8, 23.6, 22.1, 20.4, 21.6, 21.8, 22.5. Has the device encapsulation increased the mean pull-strength? Test using a = 0.05 and report the p-value.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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