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ChE253K Spring09 HW09 Problems.Rev03

# ChE253K Spring09 HW09 Problems.Rev03 - Name(Please use this...

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Name: _________________________ (Please use this as cover sheet to your homework.) ChE 253K -- Applied Statistics -- Homework 09 Due Wednesday, April 8 at Lecture Hypothesis Testing: One Mean; Large and Small Samples 0. Text Problems 7.48 and 7.49 Note: Problem 0 is interesting, but optional . Do it if you want more practice. Answers: (7.48) High Tail TS = 2.78. Sample TS = 5.59 (7.49) High Tail TS = 2.78. Sample TS = 2.11 Hypothesis Testing: Two Means; Large and Small Samples 1. Using the data in the Example on Text p. 262 (a) Do the hypothesis test using the data sheet and procedure given i with this homework. (b) Calculate the 95% confidence limits of the two sample means. Do they overlap? What is the relationship between the hypothesis test and the confidence limits? (c) Though the given values of sample mean, standard deviation and sample number do not justify rejection of the null hypothesis at the 0.05 level, might rejection be justified with a larger number of samples? (Hint: This is a trick question.)

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ChE253K Spring09 HW09 Problems.Rev03 - Name(Please use this...

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