7. The article "Hydrogeochemical Characteristics of Groundwater in a Mid-Western Coastal AquiferSystem" (S. Jeen, J. Kim, et al., Geosciences Journal, 2001:339-348) presents measurements ofvarious properties of shallow groundwater in a certain aquifer system in Korea. Following aremeasurements of electrical conductivity (in microsiemens per centimeter) for 23 water samples.2099 528 2030 1350 1018 384 14991265 375 424 789 810 522513488 200 215 486 257 557 260461 500a. 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, orapproximately 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 17.314.2 14.4 14.7 14.9 15.3 15.7 16.2 17.2 17.314.3 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 21.914.3 14.6 14.8 15.2 15.5 15.9 16.5 17.2 22.4a. 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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Answered: 2099 528 2030 1350 1018 384 1499 513…

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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5.25. Representative data on x = carbonation depth (in millimeters) and y = strength (in megapascals) for a sample of concrete core specimens taken from a particular building were read from a plot in the article “The Carbonation of Concrete Structures in the Tropical Environment of Singapore” (Magazine of Concrete Research [1996]: 293-300): Depth, x 8.0 20.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0 Strength, y 22.8 17.1 21.1 16.1 13.4 12.4 11.4 9.7 6.8 a. Construct a scatterplot. Does the relationship between carbonation depth and strength appear to be linear? Yes, the relationship between carbonation depth and strength appears to be linear however it is a negative linear relation. b. Find the equation of the of the least-squares line.c. What would you predict for strength when carbonation depth is 25 mm?d. Explain why it would not be reasonable to use the least-squares line to predict strength when carbonation depth…
The article “Hydrogeochemical Characteristics of Groundwater in a Mid-Western CoastalAquifer System” (S. Jeen, J. Kim, et al., Geosciences Journal, 2001:339–348) presentsmeasurements of various properties of shallow groundwater in a certain aquifer system inKorea. Following are measurements of electrical conductivity (in microsiemens percentimeter) for 23 water samples.2099 528 2030 1350 1018 384 14991265 375 424 789 810 522 513488 200 215 486 257 557 260461 500Find the mean.Find the standard deviation.Find the median.Construct a dotplot.Find the 10% trimmed mean.Find the first quartile.Find the third quartile.Find the interquartile range.Construct a boxplot.Which of the points, if any, are outliers?If a histogram were constructed, would it be skewed to the left, skewed to the right, orapproximately symmetric?
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Following are measurements of soil concentrations (in mg /kg) of chromium (Cr) and nickel (Ni) at20 sites in the area of Cleveland, Ohio. These data are taken from the article "Variation in NorthAmerican Regulatory Guidance for Heavy Metal Surface Soil Contamination at Commercial andIndustrial Sites" (A. Jennings and J. Ma, J. Environment Eng, 2007:587-609).Cr: 260 19 36 247 263 319 317 277 319 264 23 29 61 119 33 281 21 35 64 30Ni: 435 377 359 53 38 38 54 188 397 33 92 490 28 35 799 347 321 32 74 508 (d) Use these to construct comparative boxplots for the two sets of concentrations. (e) Using the boxplots, what differences can be seen between the two sets of concentrations?
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, median, mode, and standard deviation. b) Construct a histogram using relative frequency on the y-axis and comment on the shape of the distribution.
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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 522 557 1265 375 424 789 810 513 488 200 215 486 257 260 461 500 a. Find the mean. ъ. Find the standard deviation. C. Find the median. d. Construct a dotplot. e. Find the 10% trimmed mean. Find the first quartile. Find the third quartile. Find the interquartile range. Construct a boxplot. f. g- h. i. j. Which of the points, if any, are outliers? k. If a histogram were constructed, would it be skewed to the left, skewed to the right, or approximately symmetric?

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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.