3301PracticeTest3

3301PracticeTest3 - IE 3301 Practice Quiz 3 Spring 2008...

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IE 3301 Practice Quiz 3 Spring 2008 NAME: ___________________________ GRADE ___________ ____ DO ALL WORK FOR CREDIT IN PENCIL IN THE SPACE PROVIDED. 1. The wall thickness of 36 glass two-liter bottles was measured by a quality-control engineer. The sample mean was 4.05 mm and the sample standard deviation was 0.12 mm. The distribution of wall thickness is unknown. (a) Find a 90% confidence interval on the true mean wall thickness. (b) Test a one-sided hypothesis to ensure that the true mean thickness exceeds 4.15 mm as required by the FDA by finding the associated P-value and drawing a conclusion from it.
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2. Of 1000 randomly selected cases of lung cancer, 823 resulted in death. (a) Construct a 95% confidence interval on the death rate from lung cancer. (b) For the null hypothesis that p = 0.8, find the P-value and state your conclusion on for this two-sided hypothesis.
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3. Two types of plastic are suitable for use by an electronics component manufacturer. The relative breaking strengths of these plastics, which are both normally distributed, are
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This note was uploaded on 08/30/2009 for the course IE 3301 taught by Professor Staff during the Spring '08 term at UT Arlington.

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3301PracticeTest3 - IE 3301 Practice Quiz 3 Spring 2008...

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