Questions 15 through 20. An article in Communications of the ACM reported on a study of differentalgorithms for estimating software development costs. Three algorithms were applied to 15 softwaredevelopment projects and the development costs (hours) were observed. The data are given as below.Algorithm 1 4.7| 4.9 5.8 4.8 3.7Algorithm 2 6.7 5.8 7.7 6 8.7Algorithm 3 8.6 9.6 9.5 10 10.8Consider an ANOVA situation with a significance level a = 0.01.15. Choose the correct quantity to describe the total variability between treatment means.A 60.7413 B672.739171.4373300.7403 E 10.69616. Find the test statistic values.A 36.073 B 38.072917. Find the rejection region.A [3.8, +∞] B [-∞, 6.93]28.0734 D 34.0733 E 32.0732[8.51, +∞] D [-∞, 3.8] E [6.93, +∞]Page 218. Find the least significant difference (LSD) for the Fisher's multiple comparision.(A) 1.8242 0.8843 2.5643 (D) 3.2843 E2.0393

Null hypothesis: There is no difference in the mean development cost from the three…

Answered: Questions 15 through 20. An article in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. The incidence of cancer among phosphate mine workers and their exposure to radiation was investigated. Cancer incidence was recorded among 60 phosphate mine workers who had 0-29 working level months (WLM) of exposure, 60 phosphate mine workers who had 30-89 WLM of exposure, and 60 phosphate mine workers who had 90-120 WLM of exposure. The number of cancer incidences for each group are presented in Table 1. Table 1: Two-way Table of Counts Cancer Incidence Exposure Level Yes No Total 0-29 WLM 20 40 60 30-89 WLM 33 27 60 90-120 WLM 43 17 60 Total 96 84 180 Perform a x? test, at the 5% level of significance, whether cancer incidence rates differ between the three levels of radiation among phosphate mine workers.
The following data are for the throughput, as measured by the number of wafer lots produced per day by different operators (A, B, C, and D) on different machines (each operator used each machine on two different days): Eighty-four working days were needed to collect the data. The numbers in parentheses refer to the days on which the results were obtained. For example, on the first day, operator A produced 17 lots using machine 2, and on the 84th day, operator A produced 18 lots using machine 5. On some days (such as the third day), more than one item of data was collected, and on other days (such as day 40), no data was collected. Analyze the data, stating all assumptions and conclusions.
Select one: a. time-series b. cross sectional c. panel Business School Full-Time Enrollment Students per Faculty Local Tuition ($) Foreign Tuitiion ($) English Test Work Experience Starting Salary ($) 1 Melbourne Business School 200 5 24,420 29,600 No Yes 71,400 2 University of New South Wales (Sydney) 228 4 19,993 32,582 No Yes 65,200 3 Indian Institute of Management (Ahmedabad) 392 5 4,300 4,300 No No 7,100 4 Chinese University of Hong Kong 90 5 11,140 11,140 No No 31,000 5 International University of Japan (Niigata) 126 4 33,060 33,060 Yes No 87,000 6 Asian Institute of Management (Manila) 389 5 7,562 9,000 No Yes 22,800 7 Indian Institute of Management (Bangalore) 380 5 3,935 16,000 No No 7,500 8 National University of Singapore 147 6 6,146 7,170 Yes Yes 43,300 9 Indian Institute of Management (Calcutta) 463 8 2,880 16,000 No No 7,400 10 Australian National University (Canberra) 42 2 20,300 20,300 Yes Yes 46,600 11 Nanyang Technological…
Q. 22
1. 8. 9. actice Problems Jensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage (hours) and annual maintenance expense (in hundreds of dollars). Annual Weekly Usage (hours) Maintenance Expense O 18 18 15 23 25 31 33 38 O 37 48 22 32 29 34 36 40 45 53 43 41 a. Develop the estimated regression equation that relates annual maintenance expense (in hundreds of dollars) to weekly usage hours (to 3 decimals). Expense = + Weekly Usage b. Test the significance of the relationship in part (a) at a 0.05 level of significance. Compute the value of the F test statistic (to 2 decimals). The p value is less than 0.01 What is your conclusion? S Conclude that there is a significant relationship between expense and weekly usage c. Jensen expects the new machine to be used 30 hours…
1. A psychologist at a private psychiatric hospital was asked to determine whether there was any clear difference in the length of stay of patients with different categories of diagnosis. Looking at the last four patients in each of the three major categories, the results (in terms of weeks of stay) were as follows: Diagnosis Category Affective Disorders Cognitive Disorders Drug-Related Conditions 7 12 8. 6. 8 10 12 11 10 M3 = 10 M1=6 SS1 = 2 M2 = 10 SS2 = 10 SS2 = 8 Source SS df MS F Between 42.67 21.335 9.60 Within 20 6. 2.2222 Total 62.67 11 (a) Do a Tukey HSD to determine which means are different. In sentence form, explain what these results mean in context of the problem. 2.
QUESTION 1 A 8-member ABC Alliance is being created to represent groups A with 5 thousand, B with 3 thousand, and C with 4 thousand members. (a) Compute the missing Huntington-Hill numbers in the table below. Use 5, 3, and 4 for population Round the answers to two decimal places. (b) Use the table of Huntington-Hill numbers to apportion the 4th through 8th representatives. Current Number of Representatives A B 12.50 4.50 4.17 2.08 1 12 345 0.83 Which group should receive the 4th representative? Which group should receive the 5th representative? Which group should receive the 6th representative? Which group should receive the 7th representative? Which group should receive the 8th representative? | 0.75 0.45 0.30 C 8.00 12.67 0.80 0.53
EXAMPLE 3.20 Suppose a study of speeding violations and drivers who use cell phones produced the following fictional data: Uses cell phone while driving Does not use cell phone while driving Total Table 3.2 Speeding violation in the last year 25 45 70 No speeding violation in the last year 280 405 685 Total Problem a. Find P(Driver is a cell phone user). b. Find P(Driver had no violation in the last year). c. Find P(Driver had no violation in the last year was a cell phone user). d. Find P(Driver is a cell phone user U driver had no violation in the last year). e. Find P(Driver is a cell phone user driver had a violation in the last year). 1. Find P(Driver had no violation last year driver was not a cell phone user) 305 450 *** 755 The total number of people in the sample is 755. The row totals are 305 and 450. The column totals are 70 and 685. Notice that 305 + 450 = 755 and 70 +685 755. Calculate the following probabilities using the table.
1. The incidence of cancer among phosphate mine workers and their exposure to radiation was investigated. Cancer incidence was recorded among 60 phosphate mine workers who had 0-29 working level months (WLM) of exposure, 60 phosphate mine workers who had 30-89 WLM of exposure, and 60 phosphate mine workers who had 90-120 WLM of exposure. The number of cancer incidences for each group are presented in Table 1. Table 1: Two-way Table of Counts Cancer Incidence Exposure Level Yes No Total 0-29 WLM 20 40 60 30-89 WLM 33 27 60 90-120 WLM 43 17 60 Total 96 84 180 Perform a x? test, at the 5% level of significance, whether cancer incidence rates differ between the three levels of radiation among phosphate mine workers.

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