## 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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