2099 528 2030 1350 1018 384 1499 513 1265 375 424 789 810 522 488 200 215 486 257 557 260 461 500 a. Find the mean. b. Find the standard deviation. c. Find the median.
2099 528 2030 1350 1018 384 1499 513 1265 375 424 789 810 522 488 200 215 486 257 557 260 461 500 a. Find the mean. b. Find the standard deviation. c. Find the median.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:7. The article "Hydrogeochemical Characteristics of Groundwater in a Mid-Western Coastal Aquifer
System" (S. Jeen, J. Kim, et al., Geosciences Journal, 2001:339-348) presents measurements of
various properties of shallow groundwater in a certain aquifer system in Korea. Following are
measurements of electrical conductivity (in microsiemens per centimeter) for 23 water samples.
2099 528 2030 1350 1018 384 1499
1265 375 424 789 810 522
513
488 200 215 486 257 557 260
461 500
a. Find the mean.
b. Find the standard deviation.
c. Find the median.
d. Findthe 10%trimmedmean.
e.
Find the first quartile.
f. Find the third quartile.
g. Find the interquartile range.
h. Construct a boxplot.
i. Which of the points, if any, are outliers?
j.
If a histogram were constructed, would it be skewed to the left, skewed to the right, or
approximately symmetric?
8. Forty-five specimens of a certain type of powder were analyzed for sulfur trioxide content.
Following are the results, in percent. The list has been sorted into numerical order.
14.1 14.4 14.7 14.8 15.3 15.6 16.1 16.6 17.3
14.2 14.4 14.7 14.9 15.3 15.7 16.2 17.2 17.3
14.3 14.4 14.8 15.0 15.4 15.7 16.4 17.2 17.8.
14.3 14.4 14.8 15.0 15.4 15.9 16.4 17.2 21.9
14.3 14.6 14.8 15.2 15.5 15.9 16.5 17.2 22.4
a. Construct a stem-and-leaf plot for these data.
b. Construct a histogram for these data.
c. Construct a boxplot for these data. Does the box- plot show any outliers?
2
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