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Business / Statistics for Business and Economics 12 / Chapter 15 / Problem 52E

Statistics for Business and Economics | 12th Edition | ISBN: 9780321826237 | Authors: James T. McClave, P. George Benson, Terry T Sincich

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Solution: Homework assistance for accounting students. Refer

Chapter 15, Problem 52E

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QUESTION:

Homework assistance for accounting students. Refer to the Journal of Accounting Education (Vol. 25, 2007) study of assisting accounting students with their homework, Exercise 15.22 (p. 15-15). A completely randomized design was employed, with students randomly assigned to receive one of three different levels of assistance on the homework: (1) the completed solution, (2) check figures at various steps of the solution, and (3) no help at all. The response variable of interest to the researchers was the knowledge gain (or, test score improvement). The data (simulated from descriptive statistics published in the article) are saved in the file. Analyze the data with the appropriate nonparametric method. Interpret the results, practically. Does your conclusion agree with the inferences drawn from the parametric analysis in Exercise 9.30 (p. 510)?

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QUESTION:

Homework assistance for accounting students. Refer to the Journal of Accounting Education (Vol. 25, 2007) study of assisting accounting students with their homework, Exercise 15.22 (p. 15-15). A completely randomized design was employed, with students randomly assigned to receive one of three different levels of assistance on the homework: (1) the completed solution, (2) check figures at various steps of the solution, and (3) no help at all. The response variable of interest to the researchers was the knowledge gain (or, test score improvement). The data (simulated from descriptive statistics published in the article) are saved in the file. Analyze the data with the appropriate nonparametric method. Interpret the results, practically. Does your conclusion agree with the inferences drawn from the parametric analysis in Exercise 9.30 (p. 510)?

ANSWER:

Step 1 of 6

Here we randomly assigned different level of assistance on homework to the students -

completed solutions, check figures and no solutions and measure the knowledge gain by

test scores, for the three groups.

We have to test the following null and alternative hypotheses.

: The knowledge gained by all the three groups is same.

Versus

: The knowledge gained by at least two of the three groups is different

We set the level of significance as = 0.05 .

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