Exam (elaborations)
Summary Statistics.
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Exam of 2 pages for the course Chapter 4 - Summary Statistics at Chapter 4 - Summary Statistics (Summary Statistics.)
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Summary Statisticsmean - correct answer-The arithmetic average of a data set is the:
adding all values, dividing by the number of values - correct answer-Mean is calculated by:
sample size - correct answer-In statistics, n designates:
susceptibility to skew - correct answer-A major failing of the mean in describing a data set is
its:
median - correct answer-The midpoint of a distribution is the:
mode - correct answer-The most frequently occurring value in the data set is:
unimodal - correct answer-The mean, median, and mode will coincide in _____ distributions.
symmetric - correct answer-When mean = median, the distribution is:
positively skewed - correct answer-When mean > median, the distribution is:
negatively skewed - correct answer-When mean < median, the distribution is:
range - correct answer-The simplest measure of spread is:
underestimate - correct answer-The main failing of range as a measure of variability is that it
tends to _______ the range of a population.
quartiles - correct answer-A somewhat more nuanced method of determining spread is by
separating it into four equal segments, called:
five point summary - correct answer-The defining points of the quartiles taken together is
termed the:
Q3-Q1 - correct answer-The interquartile range is a summary measure of spread
representing the middle 50% of the values, calculated as:
box and whisker plot - correct answer-A visual representation of data sectioned into quartiles
is:
1.5*IQR - correct answer-When constructing a box and whisker plot, a value is considered
an outside value if it falls farther than _____ from Q1 or Q3.
variance, standard deviation - correct answer-The most common measures of spread are:
(Xi-X) - correct answer-The deviation of each datapoint is calculated as:
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