Wednesday
April 16, 2014

Homework Help: statistics

Posted by aisha on Thursday, June 28, 2012 at 9:11pm.

Acrylic bone cement is commonly used in total joint replacement to secure the artificial joint. Data on the force (measured in Newtons, N) required to break a cement bond was determined under two different temperature conditions and in two different mediums appear in the following table.
Temperature Medium Data on Breaking Force
22 degrees Dry 100.5, 141.5, 194.8, 118.4, 176.1, 213.1
37 degrees Dry 302.1, 338.1, 288.8, 306.8, 305.2, 327.5
22 degrees Wet 386.2, 367.3, 322.6, 307.4, 357.9, 321.4
37 degrees Wet 363.7, 377.9, 327.7, 331.9, 338.1, 394.6
(a) Estimate the difference between the mean breaking force in a dry medium at 37 degrees and the mean breaking force at the same temperature in a wet medium using a 90% confidence interval. (Round your answers to the nearest whole numbers.)
( , )

(b) Is there sufficient evidence to conclude that the mean breaking force in a dry medium at the higher temperature is greater than the mean breaking force at the lower temperature by more than 100 N? Test the relevant hypotheses using a significance level of .10.
t = (Round the answer to two decimal places.)
df =
P = (Round the answer to three decimal places.)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Maths - Sam used cement and sand to prepare a mixture. The ratio of the number ...
TEACHER AIDES - 8. Which of the following statements is true of joint physical ...
teacher aides - 8. Which of the following statements is true of joint physical ...
Math - A contractor requires a cement mix that is 70% sand and 30% cement. He ...
Physics - As a swimmer pulls his arm through the water, various muscles exert ...
Animal Skeletal and Muscular Systems - Which of the following is an example of ...
psychology statistics - The three commonly used alpha levels are p=01, p=05, ...
Biology - What is the habitat and # of living species of: 1.single celled ...
Biology - What are the roles of the scapula? Are these correct? Aids movement of...
Algebra 1 - You are making up your own mix of concrete to patch a set of stairs...

Search
Members