KEY TERMS

Question

apparent limits
bar graph
continuous numbers
cumulative frequency
cumulative percentage
discrete numbers
frequency distribution
frequency polygon
grouped frequency distribution
histogram
kurtosis
midpoint
modality
negative skew
positive skew
real limits
stem-and-leaf display
skewness
ungrouped frequency distribution
the middle of an interval in a grouped frequency distribution.
what seem to be the upper and lower bounds of an interval in a grouped frequency distribution.
a tally of how often different values of a variable occur in a set of data.
cumulative frequency expressed as a percentage of the number of cases in the data set.
answer the question “how many,” take whole number values, and have no “in-between” values.
a count of how often a given value, or a lower value, occurs in a set of data.
an asymmetrical frequency distribution in which the tail extends to the left, in the direction of lower scores.
deviation from symmetry in a frequency distribution, which means the left and right sides of the distribution are not mirror images of each other.
a graph of a frequency distribution for discrete data that uses the heights of bars to indicate frequency; the bars do not touch.
a data summary technique that combines features of a table and a graph.
answer the question “how much” and can have “in-between” values; the specificity of the number, the number of decimal places reported, depends on the precision of the measuring instrument.
the number of peaks that exist in a frequency distribution.
how peaked or flat a frequency distribution is.
a count of how often the values of a variable, grouped into intervals, occur in a set of data.
a count of how often each individual value of a variable occurs in a set of data.
an asymmetrical frequency distribution in which the tail extends to the right, in the direction of higher scores.
what are really the upper and lower bounds of a single continuous number or of an interval in a grouped frequency distribution.
a frequency distribution for continuous data, displayed in graphical format, using a line connecting dots, above interval midpoints, that indicate frequency.
a frequency distribution for continuous data, displayed in graph form, using the heights of bars to indicate frequency; the bars touch each other.
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