(b) A study was performed to determine whether senior workers and new workers differ in their repeatability in assembling components on printed circuit boards. Two samples of 11 senior and 9 new workers were selected, and each workers assembled the units. The sample standard deviations of assembly time were 1.21 minutes and 1.35 minutes, respectively. i. Construct 95% confidence interval of variance assembly time for senior worker. ii. Construct 95% confidence interval of variance assembly time for new worker. iii. Construct 90% confidence interval for ratio of two variances onew assembly times for new and senior workers. Interpret the senior result.

(b) A study was performed to determine whether senior workers and new workers differ in their repeatability in assembling components on printed circuit boards. Two samples of 11 senior and 9 new workers were selected, and each workers assembled the units. The sample standard deviations of assembly time were 1.21 minutes and 1.35 minutes, respectively. i. Construct 95% confidence interval of variance assembly time for senior worker. ii. Construct 95% confidence interval of variance assembly time for new worker. iii. Construct 90% confidence interval for ratio of two variances onew assembly times for new and senior workers. Interpret the senior result.

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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