Dot Plot
a simple graphical way to “see” the big picture: where are the values concentrated? Are they very dispersed or not? We summarize these as “the location of the data and its dispersion”.
Stem-and-leaf plot
the birthday summary with Months for stem and days for leaves. If you have quantitative data, example of height in meters at the closest centimeter, you take the unit and first decimal for stems and the second decimal for leaves.
outlier
an observation of data that does not fit the rest of the data. It is sometimes called an extreme value. Where is it coming from?
line graph
the data (x axis) and their frequency (y axis).
Bar graph
space between the columns.
histogram
A histogram consists of contiguous boxes ( no space between). It has both a horizontal axis and a vertical axis. The horizontal axis is labeled with what the data represents (for instance, distance from your home to school). The vertical axis is labeled either frequency or relative frequency (or percent frequency or probability).
Skewness
Skewness of data: If bars are not having a natural symmetry. It is used to describe data that is not symmetrical; when the right side of a graph looks “chopped off” compared to the left side, we say it is “skewed to the left.” When the left side of the graph looks “chopped off” compared to the right side, we say the data is “skewed to the right.” Alternatively: when the lower values of the data are more spread out, we say the data are skewed to the left. When the greater values are more spread out, the data are skewed to the right.
