Twenty five right-handed students were asked to turn a knob (using their right hands) that moved an indicator by screw action. There were two identical instruments, one with a right-hand thread (the knob turns clockwise) and the other with a left-hand thread (the knob turns counterclockwise). The data presented below gives the times (in seconds) each subject took to move the indicator a fixed distance: Obs. # R 1 2 13 14 15 6 113 105 130 101 138 118 187 IL 137 18 105 19 133 10 108 111 115 12 170 13 103 14 Obs. # R IL Obs. # R 145 15 118 175 78 16 103 96 107 17 111 122 184 18 104 103 148 19 116 147 120 107 187 21 2. Critical Region: Select one: a. T>abs(2.492) b. T<-2.492 c. T>2.492 d. T>abs(2.492) 116 189 78 1. Test Stat (round off final answer to 4 decimal places) L Obs. # R 166 22 100 146 23 89 123 24 185 135 25 188 112 193 176 116 At 1% level of significance, can we conclude that these right-handed students found it easier to use the knobs with a right-hand thread? Use the following form of the difference: right-left. 178 101 123 3. Conclusion: At 1% level of significance... Select one: a. it is easier to use the knobs with a right-hand thread among the students b. there is no evidence that it is easier to use the knobs with a right-hand thread among the students
Twenty five right-handed students were asked to turn a knob (using their right hands) that moved an indicator by screw action. There were two identical instruments, one with a right-hand thread (the knob turns clockwise) and the other with a left-hand thread (the knob turns counterclockwise). The data presented below gives the times (in seconds) each subject took to move the indicator a fixed distance: Obs. # R 1 2 13 14 15 6 113 105 130 101 138 118 187 IL 137 18 105 19 133 10 108 111 115 12 170 13 103 14 Obs. # R IL Obs. # R 145 15 118 175 78 16 103 96 107 17 111 122 184 18 104 103 148 19 116 147 120 107 187 21 2. Critical Region: Select one: a. T>abs(2.492) b. T<-2.492 c. T>2.492 d. T>abs(2.492) 116 189 78 1. Test Stat (round off final answer to 4 decimal places) L Obs. # R 166 22 100 146 23 89 123 24 185 135 25 188 112 193 176 116 At 1% level of significance, can we conclude that these right-handed students found it easier to use the knobs with a right-hand thread? Use the following form of the difference: right-left. 178 101 123 3. Conclusion: At 1% level of significance... Select one: a. it is easier to use the knobs with a right-hand thread among the students b. there is no evidence that it is easier to use the knobs with a right-hand thread among the students
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.2: The Law Of Cosines
Problem 3E
Related questions
Question
Transcribed Image Text:Twenty five right-handed students were asked to turn a knob (using their right hands) that
moved an indicator by screw action. There were two identical instruments, one with a right-hand
thread (the knob turns clockwise) and the other with a left-hand thread (the knob turns
counterclockwise). The data presented below gives the times (in seconds) each subject took to
move the indicator a fixed distance:
Obs. # R
1
2
13
14
15
6
113
105
130
101
138
118
87
IL
Obs. #R
137
18
105 9
133 10
108 11
115 12
170
13
103
14
IL |Obs. # |R
116
145
15 118
75
78
16
103
96
107
17
|111 123
122
184 18
104
135
103
148
19
111
112
| 116
147
120
89 193
107 187 121
178
176
1. Test Stat (round off final answer to 4 decimal places)
2. Critical Region:
Select one:
a. T>abs(2.492)
b. T<-2.492
c. T>2.492
d. T>abs(2.492)
Obs. # R
IL
166 22
146 23
100
At 1% level of significance, can we conclude that these right-handed students found it easier to
use the knobs with a right-hand thread? Use the following form of the difference: right-left.
189
24 85
25 188
L
116
78
101
123
3. Conclusion: At 1% level of significance...
Select one:
a. it is easier to use the knobs with a right-hand thread among the students
b. there is no evidence that it is easier to use the knobs with a right-hand thread among the
students
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