MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The design of controls and instruments affects how easily people can use them. A student project investigated this effect by asking 25 right handed students to turn a knob with their right hands that moved an indicator by screw action. There were two identical instruments, one with a right-hand thread and the other with a left-hand thread. The table given has the data from the student project.
1. Calculate and interpret a 90% confidence interval for the mean time advantage of right hand over left hand threads in the setting above.

hus (Alt+/)
1
Subject
1
2
3
4
5
6
7
8
9
10
11
12
13
HARG
14
15
16
17
18
19
20
21
22
23
24
25
n
A
1
[台
Right hand
threads (sec)
113
105
130
101
138
118
87
116
75
96
122
103
116
107
118
103
111
104
111
89
78
100
89
85
88
3
2
100%
Left hand
threads (sec)
137
105
133
108
115
170
103
145
78
107
84
148
147
87
166
146
123
135
112
93
76
116
78
101
123
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Transcribed Image Text:hus (Alt+/) 1 Subject 1 2 3 4 5 6 7 8 9 10 11 12 13 HARG 14 15 16 17 18 19 20 21 22 23 24 25 n A 1 [台 Right hand threads (sec) 113 105 130 101 138 118 87 116 75 96 122 103 116 107 118 103 111 104 111 89 78 100 89 85 88 3 2 100% Left hand threads (sec) 137 105 133 108 115 170 103 145 78 107 84 148 147 87 166 146 123 135 112 93 76 116 78 101 123
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