Hw10_2700_s09

Hw10_2700_s09 - ENGRD2700 Basic Engineering Probability and...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ENGRD2700 Basic Engineering Probability and Statistics Spring 2009 Homework 10: Hypothesis Testing for Multiple Samples. Hand in by 1:30 pm on Friday, April 24 in the ENGRD2700 dropbox. Be sure to write your name and section number (1–6) on your homework. Make sure that your homework pages are stapled together. This homework has 9 parts. NOTE: Your answers will be graded on the clarity of your writing as well as the correctness of the answer. You must show your work to receive full credit. Any work that you submit must be your own. 1. Use the data of Devore (7e), Page 334, Exercise 7 to construct a 95% confidence interval for the difference in mean Boredom Proneness Rating between men and women. 2. Consider the data of Devore (7e), Page 350, Exercise 36. (a) Construct a 95% confidence interval for the difference in mean breaking load between Abraided and Unabraided fabrics. (b) What would the same interval be if we mistakenly thought that these were independent fabric samples? (c) Compute the correlation between the U and A samples. 3. Consider the data of Devore (7e), Page 342, Exercise 28 (also used in Page 363, Exercise 59). Find a 90% confidence interval for the ratio of the two variances. Now do the same for the ratio of the two standard deviations. 4. Twenty-two students took an exam. They were divided randomly into two equal groups. Grader A marked the scripts of one group of eleven, Grader B marked the other eleven. Here are their scores: Student 1 2 3 4 5 6 7 8 9 10 11...
View Full Document

This note was uploaded on 09/06/2009 for the course ENGRD 2700 taught by Professor Staff during the Spring '05 term at Cornell.

Page1 / 2

Hw10_2700_s09 - ENGRD2700 Basic Engineering Probability and...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online