# Final review - Flashcards

## Flashcard Deck Information

 Class: MATH 2345 - Introduction to Statistics with Application to Business Subject: MATHEMATICS University: Texas Tech University Term: Spring 2010
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Mode:         ? pages Descriptive statistics collecting, summarizing, and describing data Inferential statistics drawing conclusions and/or making decisions concerning a population based only on sample data summary table indicates the frequency, amount, or percentage of items in a set of categories so that you can see differences between categories Bar charts and Pie charts are often used for categorical data
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 Pareto Chart A Pareto chart, named after Vilfredo Pareto, is a type of chart which contains both bars and a line graph. Used to portray categorical data (nominal scale) Used to separate the Ã¢vital fewÃ¢ from the Ã¢trivial manyÃ¢ Ordered Array a sequence of data, in rank order, from the smallest value to the largest value Shows range (minimum value to maximum value) May help identify outliers (unusual observations) Stem-and-Leaf Display A simple way to see how the data are distributed and where concentrations of data exist frequency distribution a summary table in which the data are arranged into numerically ordered classes.
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 Cross Tabulations A cross tabulation (often abbreviated as cross tab) displays the joint distribution of two or more variables. cross-classification (or contingency) table presents the results of two categorical variables. The joint responses are classified so that the categories of one variable are located in the rows and the categories of the other variable are located in the columns. Scatter plots A scatter plot is a type of mathematical diagram using Cartesian coordinates to display values for two variables for a set of data. used to examine possible relationships between two numerical variables central tendency the extent to which all the data values group around a typical or central value
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 variation the amount of dispersion, or scattering, of values shape the pattern of the distribution of values from the lowest value to the highest value continuous random variable variable that can assume any value on a continuum (can assume an uncountable number of values) Standardized Normal Any normal distribution (with any mean and standard deviation combination) can be transformed into the standardized normal distribution (Z)
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 Dependent variable the variable we wish to predict or explain Independent variable the variable used to predict or explain the dependent variable coefficient of determination the portion of the total variation in the dependent variable that is explained by variation in the independent variable
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## List View: Terms & Definitions

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Descriptive statisticscollecting, summarizing, and describing data
Inferential statisticsdrawing conclusions and/or making decisions concerning a population based only on sample data
summary tableindicates the frequency, amount, or percentage of items
in a set of categories so that you can see differences between categories
Bar charts and Pie charts are often used forcategorical data
Pareto ChartA Pareto chart, named after Vilfredo Pareto, is a type of chart which contains both bars and a line graph.

Used to portray categorical data (nominal scale)

Used to separate the Ã¢vital fewÃ¢ from the Ã¢trivial
manyÃ¢
Ordered Arraya sequence of data, in rank order, from the smallest value to the largest value

Shows range (minimum value to maximum value)

May help identify outliers (unusual observations)
Stem-and-Leaf DisplayA simple way to see how the data are distributed and where concentrations of data exist
frequency distributiona summary table in which the data are arranged into numerically ordered classes.
Cross TabulationsA cross tabulation (often abbreviated as cross tab) displays the joint distribution of two or more variables.
cross-classification (or contingency) tablepresents the results of two categorical variables. The joint responses are classified so that the categories of one variable are located in the rows and the categories of the other variable are located in the columns.
Scatter plotsA scatter plot is a type of mathematical diagram using Cartesian coordinates to display values for two variables for a set of data.

used to examine possible relationships
between two numerical variables
central tendencythe extent to which all the data values group around a typical or central value
variationthe amount of dispersion, or scattering, of values
shapethe pattern of the distribution of values from the lowest value to the highest value
continuous random variablevariable that can assume any value on a continuum (can assume an uncountable number of values)
Standardized NormalAny normal distribution (with any mean and standard deviation combination) can be transformed into the standardized normal distribution (Z)
Dependent variablethe variable we wish to predict or explain
Independent variablethe variable used to predict or explain the dependent variable
coefficient of determinationthe portion of the total variation in the dependent variable that is explained by variation in the independent variable