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they wanted to before turning them in. However, the The teacher from Problem 21 also tried a different a or hurts exam grades. In another class, students were students had to indicate both the original answer and th told to review their final exams and change any answer a ap- The h to determining whether changing answers helps burts exam grades. In another class, students were of a review their final exams and change any answer to changed answer for each question. The teacher graded each exam twice, once using the set of original answers and once with the changes. In the class of n 22 stu- dents, the exam scores improved by an average of M = 2.5 points with the changed answers. The standard deviation for the difference scores was s = 3.1. Are the data sufficient to conclude that rethinking and changing answers can significantly improve scores? Use a one- tailed test at the .01 level of significance. %3D

they wanted to before turning them in. However, the The teacher from Problem 21 also tried a different a or hurts exam grades. In another class, students were students had to indicate both the original answer and th told to review their final exams and change any answer a ap- The h to determining whether changing answers helps burts exam grades. In another class, students were of a review their final exams and change any answer to changed answer for each question. The teacher graded each exam twice, once using the set of original answers and once with the changes. In the class of n 22 stu- dents, the exam scores improved by an average of M = 2.5 points with the changed answers. The standard deviation for the difference scores was s = 3.1. Are the data sufficient to conclude that rethinking and changing answers can significantly improve scores? Use a one- tailed test at the .01 level of significance. %3D

MATLAB: An Introduction with Applications
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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they wanted to before turning them in. However, the EThe teacher from Problem 21 also tried a different ap- changed answer for each question. The teacher graded students had to indicate both the original answer and th or hurts exam grades. In another class, students were told to review their final exams and change any answer a. ap- amach to determining whether changing answers helns burts exam grades. In another class, students were Od to review their final exams and change any answer chudents had to indicate both the original answer and the changed answer for each question. The teacher graded cach exam twice, once using the set of original answers and once with the changes. In the class of n = 22 stu- dents, the exam scores improved by an average of M = 2.5 points with the changed answers. The standard deviation for the difference scores was s 3.1. Are the data sufficient to conclude that rethinking and changing answers can significantly improve scores? Use a one- tailed test at the .01 level of significance. D. %3D 11
Transcribed Image Text:they wanted to before turning them in. However, the EThe teacher from Problem 21 also tried a different ap- changed answer for each question. The teacher graded students had to indicate both the original answer and th or hurts exam grades. In another class, students were told to review their final exams and change any answer a. ap- amach to determining whether changing answers helns burts exam grades. In another class, students were Od to review their final exams and change any answer chudents had to indicate both the original answer and the changed answer for each question. The teacher graded cach exam twice, once using the set of original answers and once with the changes. In the class of n = 22 stu- dents, the exam scores improved by an average of M = 2.5 points with the changed answers. The standard deviation for the difference scores was s 3.1. Are the data sufficient to conclude that rethinking and changing answers can significantly improve scores? Use a one- tailed test at the .01 level of significance. D. %3D 11
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