EP BASIC BUS.STATS-ACCESS (18 WEEKS)
14th Edition
ISBN: 9780135989005
Author: BERENSON
Publisher: PEARSON CO
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Textbook Question
Chapter 11, Problem 39PS
Suppose that, when setting up the experiment in Problem 11.38, the operations manager is able to study the effect of side-to-side aspect in addition to air-jet pressure. Thus, instead of the one-factor completely randomized design in Problem 11.38, a two-factor factorial design was used, with first factor, side-to-side aspect, having two levels (nozzle and opposite) and the second factor, air-jet pressure, having three levels (30 psi, 40 psi, and 50 psi). A sample of 18 yarns is randomly assigned, 3 to each of the 6-side-to-side aspect and pressure level combinations. The breaking-strength, stored in yarn, are as follows:
At the 0.05 level of significance.
a. is there an interaction between side-to-side aspect and air-jet pressure?
b. is there an effect due to side-to-side aspect?
c. is there an effect due to air-jet pressure?
d. Plot the mean yarn breaking strength for each level to side-to-side aspect for each level of air-jet pressure.
e. if appropriate, use the Turkey procedure to study difference among the air-jet pressures.
f. On the basis of the results of (a) through (e), what conclusions can you reach concerning yarn breaking strength? Discuss.
g. Compare your results in (a) through (f) with those from the completely randomized design in Problem 11.38. Discuss fully.
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Complete the 2 x 2 Contingency table using information summarized in the study above to answer
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Need help with 2 questions
1- Parasitic worm. Lymphatic filariasis is a disease caused by a parasitic worm. Complications of the disease can lead to extreme swelling and other complications. Here we consider results from a randomized experiment that compared three different drug treatment options to clear people of the this parasite, which people are working to eliminate entirely. The results for the second year of the study are given below:38
Three drugsTwo drugsTwo drugs annually
Clear at Year 2 523142
Not Clear at Year 2 22414
(a) Set up hypotheses for evaluating whether there is any difference in the performance of the treatments, and also check conditions.
(b) Statistical software was used to run a chi-square test, which output:X2 = 23.7 df = 2 p-value = 7.2e-6
Use these results to evaluate the hypotheses from part (a), and provide a conclusion in the context of the problem.
2.
Oral contraceptive use, Part II. Suppose that the study were repeated in a…
Chapter 11 Solutions
EP BASIC BUS.STATS-ACCESS (18 WEEKS)
Ch. 11 - An experiment has a single factor with five groups...Ch. 11 - You are working with the same experiment as in...Ch. 11 - You are working with the same experiment as in...Ch. 11 - Consider an experiment with three groups, with...Ch. 11 - Prob. 5PSCh. 11 - You are working the same experiment as in Problem...Ch. 11 - One of the steps involved in the processing of...Ch. 11 - The more costly and time-consuming it is to export...Ch. 11 - A hospital conducted a study of the waiting time...Ch. 11 - A manufacturer of pens has hired an advertising...
Ch. 11 - Prob. 11PSCh. 11 - Brand valuations are critical to CEOs, financial...Ch. 11 - A pet food company has a business objective of...Ch. 11 - A transportation strategist wanted to compare the...Ch. 11 - Consider a two-factor factorial design with three...Ch. 11 - Prob. 16PSCh. 11 - Prob. 17PSCh. 11 - Prob. 18PSCh. 11 - Given a two-way ANOVA with two levels for factor A...Ch. 11 - Given a two-factor factorial experiment and the...Ch. 11 - Given the results from Problem 11.20, a. at the...Ch. 11 - An experiment was conducted to study the extrusion...Ch. 11 - Prob. 23PSCh. 11 - Prob. 24PSCh. 11 - A glass manufacturing company wanted to...Ch. 11 - Prob. 26PSCh. 11 - Prob. 27PSCh. 11 - Prob. 28PSCh. 11 - Prob. 29PSCh. 11 - Prob. 30PSCh. 11 - Prob. 31PSCh. 11 - Prob. 32PSCh. 11 - Prob. 33PSCh. 11 - Prob. 34PSCh. 11 - Prob. 35PSCh. 11 - Prob. 36PSCh. 11 - Prob. 37PSCh. 11 - Prob. 38PSCh. 11 - Suppose that, when setting up the experiment in...Ch. 11 - A hotel wanted to develop a new system for...Ch. 11 - Refer to the room service experiment in Problem...Ch. 11 - Prob. 42PS
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