Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 13, Problem 13.33SE
To determine
To check: Whether the provided test is same as the test for significant regression that has been performed in Exercise 13.32.
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A study was undertaken to determine whether there was a significant weight (in lb) loss after one year course of therapy for diabetes, and whether the amount of weight (in lb) loss was related to initial weight. The following table gives the initial weight (x) and weight after one year of therapy (y) for 16 newly diagnosed adult diabetic patients. d. Which statistical test is appropriate to use on these data?
e. Carry out the hypothesis test(s) in question in above d. Use α=0.01 (hypothesis, critical value, test statistic, conclusion)
f. Are the means statistically different?
g. Find the 99% confidence interval for the difference of the two means on weight. Interpret your finding
Perform the test of hypothesis on the following scenarios.
In building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with a variance of 81 MPa were delivered by the manufacturer. The project engineer tested 50 steel bars and found out that the mean ultimate tensile strength is 390 MPa. The decision for the extension of the contract with the manufacturer depends on the engineer. Test the hypothesis whether there is no significant difference between the two means using a two – tailed with α = 0.01.
All Fresh Seafood is a wholesale fish company based on the east coast of the U.S. Catalina Offshore Products is a wholesale fish company based on the west coast of the U.S. Table #9.2.5 contains prices from both companies for specific fish types ("Seafood online," 2013) ("Buy sushi grade," 2013). Do the data provide enough evidence to show that a west coast fish wholesaler is more expensive than an east coast wholesaler? Test at the 5% level. (Show work)
Table #9.2.5: Wholesale Prices of Fish in Dollars
Fish
All Fresh Seafood Prices
Catalina Offshore Products Prices
Cod
19.99
17.99
Tilapi
6.00
13.99
Farmed Salmon
19.99
22.99
Organic Salmon
24.99
24.99
Grouper Fillet
29.99
19.99
Tuna
28.99
31.99
Swordfish
23.99
23.99
Sea Bass
32.99
23.99
Striped Bass
29.99
14.99
Chapter 13 Solutions
Introduction to Probability and Statistics
Ch. 13.4 - Prob. 13.1ECh. 13.4 - Prob. 13.2ECh. 13.4 - Suppose that you fit the model E(y)=0+1x1+2x2+3x3...Ch. 13.4 - Prob. 13.4ECh. 13.4 - Prob. 13.5ECh. 13.4 - Prob. 13.6ECh. 13.4 - Prob. 13.7ECh. 13.4 - Prob. 13.8ECh. 13.4 - Prob. 13.9ECh. 13.4 - College Textbooks A publisher of college textbooks...
Ch. 13.4 - Prob. 13.11ECh. 13.4 - Prob. 13.12ECh. 13.4 - Prob. 13.13ECh. 13.4 - Prob. 13.14ECh. 13.4 - Prob. 13.15ECh. 13.4 - Prob. 13.16ECh. 13.5 - Prob. 13.17ECh. 13.5 - Prob. 13.18ECh. 13.5 - Prob. 13.19ECh. 13.5 - Prob. 13.20ECh. 13.5 - Prob. 13.21ECh. 13.5 - Prob. 13.22ECh. 13.5 - Prob. 13.23ECh. 13.5 - Construction Projects In a study to examine the...Ch. 13 - Prob. 13.25SECh. 13 - Prob. 13.26SECh. 13 - Prob. 13.28SECh. 13 - Prob. 13.29SECh. 13 - Prob. 13.30SECh. 13 - Prob. 13.31SECh. 13 - Prob. 13.32SECh. 13 - Prob. 13.33SECh. 13 - Quality Control A manufacturer recorded the number...Ch. 13 - Prob. 13.35SECh. 13 - Prob. 13.36SE
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