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5. A teacher wants to test three different teaching methods: I, II and III. To do this, three groups of five students each chosen at random, and each group is taught by a different method. The same examination is given to all the students, and the grades in the table was obtained. Determine wheth er there is a difference between the teaching methods at significance levels of (a) 0.05 and (b) 0.01 Method I 75 62 71 58 73 Method II 81 85 68 92 90 Method III 73 79 60 75 81

5. A teacher wants to test three different teaching methods: I, II and III. To do this, three groups of five students each chosen at random, and each group is taught by a different method. The same examination is given to all the students, and the grades in the table was obtained. Determine wheth er there is a difference between the teaching methods at significance levels of (a) 0.05 and (b) 0.01 Method I 75 62 71 58 73 Method II 81 85 68 92 90 Method III 73 79 60 75 81

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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5. A teacher wants to test three different teaching methods: I, II and II. To do this, three groups of five students each chosen at random, and each group is taught by a different method. The same examination is givan to all the students, and the grades in the table was obtaimed Determine whether there is a difference between the teaching methods at significance levels of (2) 0.05 and (b) 0.01 Method I 75 62 71 58 73 Method II 81 85 68 92 90 Method IlI 73 79 60 75 81 Essay 1. Many law enforcement agencies use voice-stress analysis to help detemine whether persons under interrogation are lying. Ifthe sound frequency of a person's voice changes when asked a question, the presumption is that the person is being untruthful. For this situation, state the null and altemative hypotheses in verbal tems, then identify what would constitute a Type I eror and a Type II eror in this situation. 2. Following a major earthquake, the city engineer must detemine whether the stadium is structurally sound for an upcoming athletic event. If the null hypothesis is "the stadium is structurally sound" and the altemative hypothesis is "the stadium is not structurally sound," which type of error (Type I or Type II) would the engineer least like to commit?
Transcribed Image Text:5. A teacher wants to test three different teaching methods: I, II and II. To do this, three groups of five students each chosen at random, and each group is taught by a different method. The same examination is givan to all the students, and the grades in the table was obtaimed Determine whether there is a difference between the teaching methods at significance levels of (2) 0.05 and (b) 0.01 Method I 75 62 71 58 73 Method II 81 85 68 92 90 Method IlI 73 79 60 75 81 Essay 1. Many law enforcement agencies use voice-stress analysis to help detemine whether persons under interrogation are lying. Ifthe sound frequency of a person's voice changes when asked a question, the presumption is that the person is being untruthful. For this situation, state the null and altemative hypotheses in verbal tems, then identify what would constitute a Type I eror and a Type II eror in this situation. 2. Following a major earthquake, the city engineer must detemine whether the stadium is structurally sound for an upcoming athletic event. If the null hypothesis is "the stadium is structurally sound" and the altemative hypothesis is "the stadium is not structurally sound," which type of error (Type I or Type II) would the engineer least like to commit?
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