Exam (elaborations)
Mat-156 Chapters 2 & 3 Test
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Mat-156 Chapters 2 & 3 Test
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Mat-156 Chapters 2 & 3 Testa display of the values that occur in a data set and how often each value, or range of values,
occurs - ANS-Frequency Distribution
a category of data in a frequency distribution - ANS-Class
a line graph that is used to display a variable whose values change over time - ANS-Time-series
Graph
displays information collected at only one point in time. - ANS-Cross-sectional graph
the value in the middle of a class - ANS-Class midpoint
a data value that falls outside the shape of the distribution - ANS-Outlier
denotes the sum of a set of values - ANS-Σ
the variable usually used to represent individual data values - ANS-x
represents the number of data values in a sample - ANS-n
represents the number of data values in a population - ANS-N
denotes the mean of a set of sample values - ANS-x̄
denotes the mean of all values in a population - ANS-μ
the arithmetic average of a distribution, obtained by adding the scores and then dividing by the
number of scores - ANS-Mean
the mean of a data set in which each data value in the set does not hold the same relative
importance.
*Xi is the data value and Wi is the weight of the data value - ANS-Weighted Mean
the middle score in a distribution; half the scores are above it and half are below it -
ANS-Median
the most frequently occurring score(s) in a distribution - ANS-Mode
one value has the greatest frequency - ANS-Unimodal
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