# Shared Flashcard Set

## Details

S1.1 - Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
26
Mathematics
08/13/2013

Term
 Statistics
Definition
 The science of collecting, organizing, summarizing, and analyzing information to draw conclusions or answer questions. In addition, statistics is about providing a measure of confidence in any conclusions
Term
 Lurking variable
Definition
 A third variable that influences two variables
Term
 Population
Definition
 The entire group of individual to be studied
Term
 Individual
Definition
 A person or object that is a member of the population being studied
Term
 Sample
Definition
 A subset of the population that is being studied
Term
 Descriptive statistic
Definition
 A numerical summary of a sample, organizing and summarizing data.
Term
 Statistic
Definition
 A numerical summary of a sample
Term
 Inferential statistics
Definition
 Using methods that take a result from a sample, extend it to a population, and measure the reliability of the result
Term
 Parameter
Definition
 A numerical summary of a population
Term
 Variables
Definition
 Characteristics of the individuals within the population
Term
 Qualitative variables
Definition
 The classification of individuals based on some attribute or characteristic
Term
 Quantitative variables
Definition
 Numerical measures of individuals where arithmetic operators provide meaningful results
Term
 Approach
Definition
 A way to look at and organize a problem so that it can be solved
Term
 Discrete variable
Definition
 A quantitative variable that has either a finite number of possible values or a countable number of possible value (counting to get the value)
Term
 Continuous variable
Definition
 A quantitative variable that has an infinite number of possible values that are not countable (measuring to get the value)
Term
 Data
Definition
 The list of observed values for a variable
Term
 Qualitative data
Definition
 Observations corresponding to a qualitative variable
Term
 Quantitative data
Definition
 Observations corresponding to a quantitative variable
Term
 Discrete data
Definition
 Observations corresponding to a discrete variable
Term
 Continuous data
Definition
 Observations corresponding to a continuous variable
Term
 Nominal level of measurement
Definition
 When the values of the variable name, label, or categorize, and the naming scheme does not allow for the values of the variable to be arranged in a ranked or specific order
Term
 Ordinal level of measurement
Definition
 When the values of the variables have the properties of the nominal level and the naming scheme allows for the values of the variable to be arranged in a ranked or specific order
Term
 Interval level of measurement
Definition
 When the values of the variables have the properties of the ordinal level and the differences in the values of the variables having meaning
Term
 Ratio level of measurement
Definition
 When the values of the variables have the properties of the interval level and the ratios of the values of the variables have meaning
Term
 Nominal and ordinal levels of measurement are
Definition
 Qualitative variables
Term
 Interval and ratio levels of measurement are
Definition
 Quantitative variables
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