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# According to the journal Chemical Engineering, an ISBN: 9780321629111 32

## Solution for problem 1.2 Chapter 1

Probability and Statistics for Engineers and the Scientists | 9th Edition

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Problem 1.2

According to the journal Chemical Engineering, an important property of a ber is its water absorbency. A random sample of 20 pieces of cotton ber was taken and the absorbency on each piece was measured. The following are the absorbency values: 18.71 21.41 20.72 21.81 19.29 22.43 20.17 23.71 19.44 20.50 18.92 20.33 23.00 22.85 19.25 21.77 22.11 19.77 18.04 21.12 (a) Calculate the sample mean and median for the above sample values. (b) Compute the 10% trimmed mean. (c) Do a dot plot of the absorbency data. (d) Using only the values of the mean, median, and trimmed mean, do you have evidence of outliers in the data?

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##### ISBN: 9780321629111

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According to the journal Chemical Engineering, an

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