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STAT-111

Terms

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systematic sampling
sample chosen with a system
lower class limit
smallest data value in a class
Discrete data
can be counted as a whole number
upper class limit
largest data value in a class
cluster sampling
divide population by geography or location then sample
variable
a characteristic or classification of the members under study
nominal level
level classifying data into categories using names or labels
Histogram
representation of frequency dist table, columns adjacent
continuous data
type of data that can possibly be a fraction
interval
level classifying data in order but no natural zero starting point, where zero means nothing
class midpoint
lower class boundary (or limit) + upper class boundary (or limit) divided by 2
Central tendency
mean, median, mode, and midrange
number of times data is repeated
frequency
Xm
symbol for class midpoint value
qualitative
type of data that is categorized by entries such as the labels (color, names, etc.)
upper class boundary
largest data value in a class boundary
symbol for sum
Class width
difference of lower class limit in two consecutive classes
Population
complete collection of all subject elements
data
the observed information which is found from counting, measuring, researching, etc.
quantitative
numerical entries
Median
the midpoint of the data array (which is when the data is arranged from max to min value
stratified sampling
divide population into a group by an important characteristic then sample
Y-axis
in histogram (vertical) represents the frequency
statistic
numerical measurement describing some characteristic of a sample
ordinal
level classifying data that can be arranged in order (e.g. ranking)
mode
value of class with most frequencies
Sample
subcollection of members selected from the entire population
Mode
most occurred value in the data set.
X-axis
in histogram (horizontal) represents the class boundaries
parameter
numerical measurement describing some characteristic of a population
ratio level
classifies data where zero means nothing
lower class boundary
smallest data value in a class boundary

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