Descriptive statistics vars

  • What are the variables in descriptive statistics?

    Descriptive statistics are broken down into measures of central tendency and measures of variability (spread).
    Measures of central tendency include the mean, median, and mode, while measures of variability include standard deviation, variance, minimum and maximum variables, kurtosis, and skewness..

  • Which descriptive statistic measures variance?

    Measuring variability: Interquartile range
    Quartiles are used in descriptive statistics to divide an ordered data group into four equal parts..

  • Analysis of variance, or ANOVA, is a statistical method that separates observed variance data into different components to use for additional tests.
    A one-way ANOVA is used for three or more groups of data, to gain information about the relationship between the dependent and independent variables.
  • Statisticians often aim to keep track of population variances in their studies.
    One key way to do so in descriptive statistics is to run an ANOVA test.
    This allows you to see how multiple different variables impact a control group.

Packages Used in This Chapter

The packages used in this chapter include: • psych • DescTools • Rmisc • FSA • plyr • boot The following commands will install these packages if

Descriptive Statistics

Descriptive statistics are used to summarize data in a waythat provides insight into the information contained in the data

Descriptive Statistics For Interval/Ratio Data

For this example, imagine that Ren and Stimpy have each heldeight workshops educating the public about water conservation at home

Descriptive Statistics For Ordinal Data

Descriptive statistics for ordinal data are more limitedthan those for interval/ratio data. You’ll remember that for ordinal data, thelevels can be ordered

Descriptive Statistics For Nominal Data

Descriptive statistics for nominal data consist of listingor plotting counts for levels of the nominal data, often by levels of agrouping variable

Optional Note on Reporting Summary Statisticshonestly

Every time we report a descriptive statistic or the result ofa statistical test, we are condensing information

Optional Analyses

Robust estimators: trimmed mean and Winsorizedmean Robust estimators of central tendency are used to describethe location of a data set without

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