cases

cases

Cases are sometimes called objects or research units, cases are the things that we are interested in studying. For example, a psychologist might study people, an economist might study businesses, a sociologist might study families. These cases are often represented as rows in a data frame.


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    • relative frequency histogram

      Relative frequency histogram is a histogram that represents proportion (instead of frequency) of cases on the y-axis.

    • sampling with replacement

      Sampling with replacement takes a sample from a population, record the values, put all cases back into the population, then sample again; the R function resample() does this.

    • population

      Population is the universe of cases that could be sampled and measured for a study.

    • histogram

      Histogram is a visualization where the x-axis represents the values of the variable while the y-axis represents frequency; the height of a bar in a histogram represents how many cases have that range of values.

    • observations

      Observations are sometimes called cases or objects or research units, observations are the things that we are interested in studying. For example, a psychologist might study people, an economist might study businesses, a sociologist might study ...