A common concern for students (and teachers) is the assignment of grades for essays or term papers. Because there are no absolute right or wrong answers, these grades must be based on a judgment of quality. To demonstrate that these judgments actually are reliable, an English instructor asked a colleague to 526 chaPTER 15 | Correlation rank-order a set of term papers. The ranks and the instructor’s grades for these papers are as follows: Rank Grade 1 A 2 B 3 A 4 B 5 B 6 C 7 D 8 C 9 C 10 D 11 F a. Compute the Spearman correlation for these data. (Note: You must convert the letter grades to ranks, using tied ranks to represent tied grades.) b. Is the Spearman correlation statistically significant? Use a two-tailed test with α = .05.

A common concern for students (and teachers) is the assignment of grades for essays or term papers. Because there are no absolute right or wrong answers, these grades must be based on a judgment of quality. To demonstrate that these judgments actually are reliable, an English instructor asked a colleague to 526 chaPTER 15 | Correlation rank-order a set of term papers. The ranks and the instructor’s grades for these papers are as follows: Rank Grade 1 A 2 B 3 A 4 B 5 B 6 C 7 D 8 C 9 C 10 D 11 F a. Compute the Spearman correlation for these data. (Note: You must convert the letter grades to ranks, using tied ranks to represent tied grades.) b. Is the Spearman correlation statistically significant? Use a two-tailed test with α = .05.

Name: 19. A common concern for students (and teachers) isthe assignment of g
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 19. A common concern for students (and teachers) isthe assignment of grades for essays or term papers.Because there are no absolute right or wrong answers,these grades must be based on a judgment of quality.To demonstrate that these judgments actuall

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 13PT

See similar textbooks

Similar questions

A group of students in Methods of Social Research wanted to study the relationship between GPA and participation in athletics among ENC traditional undergraduates. Other researchers have found that students involved in Division III athletics often have higher GPAs than the rest of the student body, so the group of students in Methods wanted to know whether this was true for ENC students. They were able to gather data on 160 ENC students (80 athletes and 80 non-athletes) and found that, among this group, the 80 athletes had slightly higher GPAs on average than the 80 students who were not athletes. In this study, who makes up the sample? Who makes up the population? Suppose they found in the sample data that the overall GPA for ENC athletes was 3.35 and for the ENC non-athletes was 3.21. Are these statistics or parameters?
The researcher hypothesizes that partners' attitudes are significantly related to each other. Test the typothesis with a coffelation and with out your conclusion. Show your work
An experiment is to be conducted with four treatment groups: A, B, C, and D. Write down linear contrast expressions for testing if the average of group means for A and B equals the average of group means for C and D; if the average of group means for A and C equals the average of group means for B and D; if the average of group means for A and D equals the average of group means for B and C. Are the three linear contrasts orthogonal?
Correlation between the error term, u, and any of the independent variables causes all of the OLS estimators to be Group of answer choices Consistent Inconsistent BLUE Unbiased None of the alternatives
A test was given to a statistics class for nursing and accounting majors. Results for the two majors and for one student in each major are given: The nursing major scored a 7474 with μ=86 and σ=6 The accounting major scored a 7272 with μ=80 and σ=4 From the information provided, determine which student received a relatively higher grade. options Both students have the same relative grade. Neither student received a positive grade; therefore, the relatively higher grade cannot be determined. The nursing major has a higher relative grade than the accounting major. The accounting major has a higher relative grade than the nursing major.
Suppose the manager of HRD would like to examine the relationship between increment in the salary (Y ) BDT and years of experience(X1)among the employees with different job categories (X2) such as clerical, custodial, and The data on 56 employees on these variables were obtained. Two dummy variables were created for the categorical independent variable X2 as D1=1 if he/she is doing custodial job and 0 for otherwise and D2=1 if s/he is doing managerial job and 0 for otherwise.. The least squares estimate are given below: Y = 120 + 10.3X1 + 20.8D1 + 32.4D2 with SE(βˆ1) = 0.876; SE(βˆ2) = 3.26 SE(βˆ2) = 3.87 and SST=12036, SSE=3050 (a) Interpret the estimate of the each of the coefficient corresponding to X1, D1 and D2. What is the difference in the estimated average increment for two employees both doing managerial job whose experience differ by 5 years? (b) What is the difference in the estimated average increment for two employees both doing managerial job whose…
Suppose that a researcher is interested in the average standardized test score for fifth graders in a local school district. The fifth graders at a specific school would comprise a ___________ and their average test score would be a ___________.
A researcher is interested in studying the effects of altitude on cognitive performance (e.g., perception, memory, problem solving, etc.). The researcher finds a group of experienced mountain climbers (n = 10) who volunteer to participate in the study. All of the climbers are tested at three different altitudes—at sea level (in the researchers’ laboratory at the University of California, San Diego), at the base camp (9,000 feet above sea level), and at 23,000 feet above sea level (at the peak of Mt. Denali in Alaska). At each location, the climbers perform a memory task (remember a list of 16 non-words like “biv”), and the accuracy of their memory is recorded (i.e., # of correctly recalled words). a. pls name the independent variable, dependent variable, levels of the IV, and the type of experiment design of this study (i.e., b/w- or w/i-subject design ) b. on what level of measurement is accuracy of memory assessed? (i.e., is it on nominal, ordinal, interval, or ratio?
A researcher is interested in studying the effects of altitude on cognitive performance (e.g., perception, memory, problem solving, etc.). The researcher finds a group of experienced mountain climbers (n = 10) who volunteer to participate in the study. All of the climbers are tested at three different altitudes—at sea level (in the researchers’ laboratory at the University of California, San Diego), at the base camp (9,000 feet above sea level), and at 23,000 feet above sea level (at the peak of Mt. Denali in Alaska). At each location, the climbers perform a memory task (remember a list of 16 non-words like “biv”), and the accuracy of their memory is recorded (i.e., # of correctly recalled words). a. pls name the independent variable, dependent variable, levels of the IV, and the type of experiment design of this study (i.e., b/w- or w/i-subject design ) b. on what level of measurement is accuracy of memory assessed? (i.e., is it on nominal, ordinal, interval, or ratio?) View…
The median number of part-time employees at fast-food restaurants in a particular city wasknown to be 18 last year. City officials think the use of part-time employees may be increasing.A sample of nine fast-food restaurants showed that seven restaurants were employing morethan 18 part-time employees, one restaurant was employing exactly 18 part-time employees,and one restaurant was employing fewer than 18 part-time employees. Can it be concludedthat the median number of part-time employees has increased? Test using a = .05.
In the DBE 122 class, there are 350 possible points. These points come from 5 homework sets that are worth 10 points each and 3 exams that are worth 100 points each. A student had received homework scores of 7,8,7,5, and 8 and the first two exam scores are 81 and 80. Assuming that grades are assigned according to the standard scale, where if the grade percentage is 0.9 or higher the student will get an A and if the grade percentage is between 0.8 and 0.9 the student will get a B, and there are no weights assigned to any of the grades. Is it possible for the student to receive an A in the class? What is the minimum score on the third exam that will give an A? What about a B?
Suppose IQ scores were obtained for 20randomly selected sets of twins. The 20 pairs of measurements yield x=104.38, y=103.25, r=0.826, P-value=0.000, and y=19.99+0.8x, where x represents the IQ score of the twin born first. Find the best predicted value of y given that the twin born first has an IQ of 110?Use a significance level of 0.05. The best predicted value of y is: