ChE253K Spring09 HW08 Solutions.Rev03

ChE253K Spring09 HW08 Solutions.Rev03 - ChE 253K - Applied...

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ChE 253K -- Applied Statistics -- Homework 08 1. Text Problem 7.27 1 Point. (a) Rejects 1 Point. (b) Accepts 2. Text Problem 7.37 1 Point. (a) Changes 1 Point. (b) Reduces (c) Increases 3. Lecture Problems 2 Points for Effort (a) M&M Large Sample, UnEqual 2 Points for Effort (b) M&Ms Small Sample, UnEqual 2 Points for Effort (c) M&Ms Small Sample, Greater 4. Using the data in Example on p. 249 5 Points. (a) Test the null hypothesis . .. 5 Points. (b) Calc 99% confidence limits . .. 5. Example p. 250-1 (a) Confidence limits 5 Points (b) Test the hypotheses 4 Points (c) How many more samples Total: 30 Points Partial Credit Guide: 5 Points: Correct calculations and correct conclusion 4 Points: Correct calculation without stating the conclusion. 3 Points: All calculations done, mostly correct. 2 Points: All calculations done, with some errors. 0 Points: No calc's or wrong calc's for the problem
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ChE 253K -- Applied Statistics Homework #8 -- Hypothesis Tests Formulating Hypotheses 1. Text Problem 7.27 Rate the impact of the errors as minor, major or catastrophic. (a) Erroneously rejecting the null hypothesis is called a Type I Error; the probability of this is designated by the Greek letter alpha ( α ). If the engi- neers said a safe dam was unsafe, that would be a major error, because fix- ing a dam is a major project.
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This note was uploaded on 02/25/2010 for the course CHE 253k taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

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ChE253K Spring09 HW08 Solutions.Rev03 - ChE 253K - Applied...

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