A large manufacturing company investigated the service it received from suppliers and discovered that, in the past, 32% of all materials shipments were received late. However, the company recently installed a just-in-time system in which suppliers are linked more closely to the manufacturing process. A random sample of 110 deliveries since the just-in-time system was installed reveals that 22 deliveries were late. Use this sample information to test whether the proportion of late deliveries was reduced significantly. Let a = 0.05. a) Show the verification that the sampling distribution of the proportion is normal. b) Follow the procedure for tests of hypothesis and use a 5% level of significance. Use the following hypotheses... Họ: p = 0.32 %3D H1: p < 0.32

A large manufacturing company investigated the service it received from suppliers and discovered that, in the past, 32% of all materials shipments were received late. However, the company recently installed a just-in-time system in which suppliers are linked more closely to the manufacturing process. A random sample of 110 deliveries since the just-in-time system was installed reveals that 22 deliveries were late. Use this sample information to test whether the proportion of late deliveries was reduced significantly. Let a = 0.05. a) Show the verification that the sampling distribution of the proportion is normal. b) Follow the procedure for tests of hypothesis and use a 5% level of significance. Use the following hypotheses... Họ: p = 0.32 %3D H1: p < 0.32

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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