The existing system for the production of a certain item has a mean of 50 seconds, and a standard deviation of 20 seconds. The company wishes to procure a new computerised system and to test the efficiency of the new system, 30 items are sampled giving a mean of 43 seconds. Test at both significant level stated below to decide whether the existing system should be replaced or not. a) 0.05 b) 0.01

The existing system for the production of a certain item has a mean of 50 seconds, and a standard deviation of 20 seconds. The company wishes to procure a new computerised system and to test the efficiency of the new system, 30 items are sampled giving a mean of 43 seconds. Test at both significant level stated below to decide whether the existing system should be replaced or not. a) 0.05 b) 0.01

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Description: The existing system for the production of a certain item has a mean of 50 seconds, anda standard deviation of 20 seconds. The company wishes to procure a new computerisedsystem and to test the efficiency of the new system, 30 items are sampled giving

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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