Reference no: EM131008678
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.
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tive frequency for a given class interval are the sums
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2099
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528
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2030
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1350
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1018
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384
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1499
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of the frequencies and relative frequencies, respec-
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1265
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375
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424
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789
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810
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522
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513
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tively, over all classes up to and including the given
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488
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200
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215
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486
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257
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557
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260
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class. For example, if there are five classes, with fre-
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461
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500
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quencies 11, 7, 3, 14, and 5, the cumulative frequen-
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cies would be 11, 18, 21, 35, and 40, and the cumulative relative frequencies would be 0.275, 0.450,
a. Find the mean.
b. Find the standard deviation.
c. Find the median.
d. Construct a dotplot.
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?
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Determining the probabilities or percentages
: For Exercises 21-28, use the 68-95-99.7 Rule to approximate the probabilities rather than using technology to find the values more precisely. Answers given for probabilities or percentages from Exercise 29 and on assume that a calculator or softwa..
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How tall must a man be so that we would predict
: Assume that the least-squares line for predicting forearm length (y) from height (x) is y = -0.2967 + 0.2738x . Both forearm length and height are measured in inches in this equation. Predict the forearm length of a man whose height is 70 in.
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How much disease was detected overall in the assessed block
: How much disease was detected overall in the assessed block - Was the amount of disease likely based on the weather?
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How much do you predict their tensile strengths to differ
: In a study of the relationship between the Brinell hardness (x) and tensile strength in ksi (y) of specimens of cold drawn copper, the least-squares line was y = -196.32 + 2.42x . Predict the tensile strength of a specimen whose Brinell hardness..
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Find the interquartile range
: Find the mean. Find the standard deviation. Find the median. Construct a dotplot.
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Explore sampling issues in ecology
: To quantify the vertical distribution and abundance of biota along a rocky intertidal shore (an environmental gradient)- LOCATION WAS FLINDERS Melbourne australia
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Problem regarding the incubator business
: The new business "incubator" was assigned the 200 numbers between 452-2500 and 452-2699, but these businesses don't subscribe to digital TV. What is the probability that the randomly selected number will be for an incubator business?
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Introduction of the belgian euro coin
: Shortly after the introduction of the Belgian euro coin, newspapers around the world published articles claiming the coin is biased. The stories were based on reports that someone had spun the coin 250 times and gotten 140 heads- that's 56% heads.
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Binomial to determine the probability
: Use the Normal model to approximate the Binomial to determine the probability of at least 246 passengers showing up. Should the airline change the number of tickets they sell for this flight? Explain.
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