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33 Cards in this Set

  • Front
  • Back
data
observations that have been collected
statistics
collection of methods for planning studies, obtaining data, organizing, summarizing, presenting, analyzing, interpreting
population
complete collection of elements
census
collection of data from every single member of the population
sample
subcollection of members selected from the population
parameter
numerical measurement describing a characteristic of a population
statistic
numerical measurement describing some characteristic of a sample
quantitative data
numbers representing measurements or counts
qualitative or categorical data
non numerical measurements
discrete data
countable number
continuous data
infinite values, i.e decimals
ratio level of measurement
a zero starting point
center
a representative or average value that indicates where the middle of the data set is located
variation
a measure of the amount that the data values vary among themselves
distribution
nature or shape of the distribution of the data
outliers
sample values that lie very far away from the vast majority of the other sample values
frequency table
lists data values along with their corresponding frequencies
frequency
number of values that fall into that particular class
lower class limits
smallest numbers that can belong to the different classes
upper class limits
largest numbers that can belong to the different classes
class boundaries
are numbers used to separate but without the gaps created by class limits
class midpoints
values in the middle of the classes
class width
difference between two consecutive lower class limits or two consecutive lower class boundaries
relative frequency
change into percents
histogram
bar graph
horizontal on histogram
class boundaries
vertical on histogram
use class frequencies
measure of center
value of the center or middle of a data set
arithmetic mean
adding values and dividing the total by the number of values
x with a bar above it
mean of a sample
the muu
mean of a population
median
middle value when data values are arranged in order
midrange
minimum and maximum divided by two