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can any result be discarded

1. The following percentages of chloride were found: 32.52%, 32.14%, 32.61% and 32.75%.
a. Find the mean, the standard deviation and the relative deviation.
b. Can any result be discarded?
Mean = 32.51%
Standard deviation = .002611
Relative deviation = .008031

Can any result be discarded? if yes why?
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Answer #1
Mean = (32.52+32.14+32.61+32.75)/4 = %32.50

Standard deviation =
|32.50-32.52| = .02
|32.50-32.14| = .36
|32.50-32.61| = .11
|32.50-32.75| = .25
(.02+.36+.11+.25)/4= .19 So the standard deviation is .19

Relative deviation = .19/32.50=.0058 or %0.58

B) Yes, %32.14, because it deviates too far from the average.
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Answer #2

mean:32.51  SD:0.2611   RD:.0080

source: self
answered by: noway
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Answer #3

No, because none of the results are more than two standard deviations from the mean.

source: Myself
answered by: anonymous
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