A stem-and-leaf plot is a method for visualizing data in which the tens digits of the data points are written in a column and the ones digits are written in rows next to them. The tens digits form the stem, and the ones digits are the leaves.
Continue ReadingFor data values in the hundreds or thousands, the largest digit is put in the stem with the remaining digits are put in the leaves. A stem-and-leaf plot is similar to a histogram but contains the exact value of every data point. Stem-and-leaf plots are therefore useful for determining common statistical metrics such as the mode and median.
Learn more about Data GraphsNumerical data is data that is expressed with digits as opposed to letters or words. For example, the weight of a desk or the height of a building is numerical data.
Full Answer >A tabular data presentation is the clear organization of data into rows and columns to facilitate communication. Tables can clearly convey large amounts of information that would be cumbersome to write in paragraph form.
Full Answer >The main reason to use a stem-and-leaf plot instead of a dot plot is to assess group trends and individual values better. Both are methods of grouping data and can be used to recognize trends in that data, and some trends are more obvious in one or the other.
Full Answer >A foreign key is a column (or group of columns) in a relational database table that provides a link between data in two tables. A foreign key in one table corresponds to a primary key in another table.
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