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35 Cards in this Set

  • Front
  • Back
a way to get information from data
statistics
methods of organizing, summarizing, and presenting data in a convenient and informative way
descriptive statistics
methods used to draw conclusions or inferences about characteristics of populations based on sample data
inferential statistics
the group of all items of interest to a statistics practitioner, may be infinitely large
population
descriptive measure of a population
parameter
set of data drawn from the population
sample
descriptive measure of a sample
statistic
____ are used to make inferences about _____
statistics, parameters
the process of making an estimate, prediction, or decision about a population based on sample data
statistical inference
the proportion of times that an estimating procedure will be correct
confidence level
measures how frequently a conclusion will be wrong in the long run
significance level
some characteristic of a population or sample
variable
possible observations of a variable
values
observed values of a variable
data
real number data (height, weight, income)
interval/quantitative/numerical
category data
nominal/qualitative/categorical data
nominal data that is ordered
ordinal data
summarization of data in a table that presents the categories and their counts
frequency distribution
lists the categories and the proportion with which each occurs
relative frequency distribution
chart used to display frequencies
bar chart
chart used to display relative frequencies
pie chart
histogram with long tail extending to the right
positively skewed
histogram with long tail extending to the left
negatively skewed
class with the highest number of observations
modal class
histogram with a single peak
unimodal histogram
histogram w/ two peaks
bimodal histogram
histogram turned on its side that shows each observation
stem and leaf display
progressive summation of relative frequency distributions
cumulative relative frequency distribution
statistical techniques applied to single sets of data
univariate
statistical techniques used to describe the relationship between variables
bivariate
table used to describe the relationship between two nominal variables
contingency table
observations measured at the same time
cross-sectional data
observations measured at successive points in time
time-series data
time-series data is graphically depicted on a
line chart
graphical representation of cumulative relative frequency chart
ogive