Question
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?
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?
Answers
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.
mean:32.51 SD:0.2611 RD:.0080
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