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### 35 Cards in this Set

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 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