Six measurements were made of the time in seconds for 20 oscillations of a mass hung from a spiral spring as follows: 20.1, 20.2, 20.3, 20.1, 20.0, 20.2.The standard error is?
Options:
A 2.5x103
B 5x10-2
C 2.5x10-3
D 5x102
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Answer:
c is the right answer but I m not sure
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