A study was carried out to determine whether the resistance of the control circuits in a machine are lower when the machine motor is running. To investigate this question, a set of the control circuits was

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Author:Amos Gilat
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Question 4
A study was carried out to determine whether the resistance of the
control circuits in a machine are lower when the machine motor is
running. To ivestigate this question, a set of the control circuits was
tested as follows. Their resistance was measured while the machine
motor was not running for a certain period of time and then again
Page 4
while the motor was running. The values found are listed in worksheet
'Dataset4', with kilo-Ohms as the unit of measurement.
1. Set up the structure of an appropriate statistical test to determine
whether the resistance of the control circuit in a machine is lower
when the machine motor is running.
2. Explain how the order of subtraction chosen to calculate the dif-
ferences will influence the structure of the test.
Transcribed Image Text:Question 4 A study was carried out to determine whether the resistance of the control circuits in a machine are lower when the machine motor is running. To ivestigate this question, a set of the control circuits was tested as follows. Their resistance was measured while the machine motor was not running for a certain period of time and then again Page 4 while the motor was running. The values found are listed in worksheet 'Dataset4', with kilo-Ohms as the unit of measurement. 1. Set up the structure of an appropriate statistical test to determine whether the resistance of the control circuit in a machine is lower when the machine motor is running. 2. Explain how the order of subtraction chosen to calculate the dif- ferences will influence the structure of the test.
C
Motor running
Motor not running
13.76
13.49-
14.00
13.68
13.78
13.42
13.54
13.30
13.54
13.26
13.42
13.17
13.42
13.06
13.18
12.78
13.16
12.87
12.96
12.62
12.74
12.35
12.70
12.27
12.46
12.10
12.30
11.98
12.32
11.94
12.22
11.76
12.14
11.57
12.38
11.74
13.84
13.32
13.84
13.36
Datagat 1
Date
Datacot
Transcribed Image Text:C Motor running Motor not running 13.76 13.49- 14.00 13.68 13.78 13.42 13.54 13.30 13.54 13.26 13.42 13.17 13.42 13.06 13.18 12.78 13.16 12.87 12.96 12.62 12.74 12.35 12.70 12.27 12.46 12.10 12.30 11.98 12.32 11.94 12.22 11.76 12.14 11.57 12.38 11.74 13.84 13.32 13.84 13.36 Datagat 1 Date Datacot
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