Illustration 15.16. A group of ten workers of a factory is ranked .according to their efficiency by two different judges as follows:Judgement ofJudge AJudgement ofJudge BName of WorkerA438.6.6.7E11F32457I10J9.10Compute the coefficient of rank correlation.

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Answered: Illustration 15.16. A group of ten…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Problem 1P

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2. Consider the following examples; would you expect the correlation coefficient to be close to 1, -1, or 0 (10 points): The amount of time a dog is walked, and the number of hours the dog sleeps at night Outdoor temperature and snowfall. The length of time someone wears braces and their SAT scores. 3. The following graph represents the amount of time that someone studies for their final exam, and their final examination grade (HINT) (20 points). Student 1 Student 2 Student 3 Student 4 Student 5 Student 6 Hours Studied 4 7 11 8 10 8 Final Exam Grade 55% 72% 88% 93% 91% 84% Graph the following students as ordered pairs. Let the x-axis represent the hours studied, and the y-axis represent the students’ final exam grade. Circle the value that best represents the estimate of r: (circle one) -0.99, -0.62, -0.30, 0, 0.30, 0.75, 0.85, 0.99
.14. The ranks of 10 students in two subjects A and B are as follows: A: 3 8. 4 7. 10 2 1 6 9 B: 6 4 6. 8. 2 3 10 5 7 Calculate the coefficient of rank correlation 219
3. The table below gives the ranking of the top CEO's bonus payments for ten Companies based in Muscat along with the ranking of their profits. Rank 1 implies highest bonus or profit, rank 10 is lowest bonus or profit. Company CEO Bonus Company profit A 1 3 1 D 4 E 5 8. F 6. 7 7 6. H 8 10 9 4 J 10 9. Use the Spearman's rank correlation test to determine whether a significant degree of positive rank correlation exists, using a = 0.1 as the desired significance level. Clearly state the conclusion to your hypothesis test. Use Spearman's Rank Correlation Test (a = 10%) to test the hypothesis 3.
Suppose the following data show the rankings of 11 states based on expenditure per student (ranked 1 highest to 11 lowest) and student-teacher ratio (ranked 1 lowest to 11 highest). State Expenditureper Student Student-TeacherRatio A 9 10 B 5 7 C 4 6 D 2 11 E 6 4 F 11 3 G 1 1 H 7 2 I 8 8 J 10 5 K 3 9 What is the rank correlation between expenditure per student and student-teacher ratio? (Round your answer to three decimal places.) Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = rs =
6. Which of these relationships would be better described with a Spearman's rank coefficient than with a Pearson's coefficient? a. The association between income and educational attainment (measured in years of school) b. The association between hours of sleep and score on an exam C. The association between years aged and price of wine d. The association between ice cream sales and crime rates e. The association between number on NY Times Best Seller List and copies of book sold
The asking prices (in Rands) and the actual selling prices (in Rands), after bargaining, of 8 commodities are given below. Commodity A D E F G H Asking price, x 150 350 400 750 100 650 600 250 Selling price, y 120 200 400 550 80 450 350 200 Find the correlation coefficient for the above data. A. 0.8224 B. 0.3722 С. 0.9438 D. 0.5318 Activate
Suppose you are given the following five pairs of scores: X Y 8 1 7 2 6 3 9 4 0 10 Create a scatter diagram of these scores in the following diagram. For each of the five (X, Y) pairs, click on the plotting symbol (the black X) in the upper right corner of the tool, and drag it to the appropriate location on the grid. y 10 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 The mean x score is Mx = 5 x 7 10 Based on your scatter diagram, you would expect the correlation to be and the mean y score is My = ?
Illustration 15.17. A group of eight students get the following percentage of marks in test in Statics and Accountancy. Roll numbers of Students % of marks in % marks in Statistics Accountancy 11 50 80 12 60 71 13 65 60 14 70 75 15 75 90 16 40 82 17 70 70 18 80 50 Compute the rank correlation coefficient.
For the following pairs of data points (10, 100), (8, 120), (5, 200), (4, 200), (10, 90), (7, 110), and (6, 150), the relationship between X and Y is a. Zero O b. None C. Positive d. Negative NEXT PAGE GE for anything acer
refer to the following: For countries listed in the Human Development Report, the correlation between the percent of people using the Internet and per capita gross domestic product (GDP) is 0.888. The correlation (r) between the percent of people using the Internet and the percent using cell phones is 0.818. The correlation between the percent of people using the Internet and the literacy rate is 0.669. The correlation between the percent of people using the Internet and the fertility rate is -0.551. 10) Which variable (GDP, percent using cell phones, literacy rate, or fertility rate) has the strongest linear association with Internet use? Which variable has the weakest linear association with Internet use? Strongest: Weakest:
Q1. A psychologist conducted a study on the relationship between introversion and shyness. The values are results for scales of introversion and shyness. High positive scores on each scale indicate high introversion or shyness; and high negative scores indicate low introversion or shyness. Data collected from 10 people as follows: Introversion 4 -7 -1 0 6 7 -4 -9 -5 8 Shyness 11 -7 -1 -3 0 7 -1 -8 -1 5 a) Compute the correlation coefficient relating introversion and shyness scores. b) Find the regression equation which predicts introversion from shyness. c) What introversion score would you predict from a shyness score of 7?
3.18. In Table 3.5, you are given the ranks of 10 students in midterm and final examinations in statistics. Compute Spearman's coefficient of rank correlation and interpret it. Rank Midterm Final A13 A B 832 C 7 8 D 10 7 Student E99 F 5 56 G 4 5 & H 8 10 I 2 1 J 64

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Illustration 15.16. A group of ten workers Of a factory is ranke according to their efficiency by two different judges as follows: Judgement of Judge A Judgement of Judge B Name of Worker A 4 3 8 6 D 7 5 E 1 1 F 3 2 G 2 4 H 5 7 I 10 J 9 10 Compute the coefficient of rank correlation.