The values that divide a rank-ordered set of data into 100 equal parts are called percentiles and are used to compare and interpret data. For example, an observation at the 50th percentile would be gr...The values that divide a rank-ordered set of data into 100 equal parts are called percentiles and are used to compare and interpret data. For example, an observation at the 50th percentile would be greater than 50 % of the other obeservations in the set. Quartiles divide data into quarters. The first quartile is the 25th percentile, the second quartile is 50th percentile, and the third quartile is the the 75th percentile. The interquartile range is the range of the middle 50 % of the data values
The basic format of the plot is a box drawn from Q1 to Q3, a vertical line drawn inside the box for the median, and horizontal lines (called whiskers) extending out of the middle of each end of the bo...The basic format of the plot is a box drawn from Q1 to Q3, a vertical line drawn inside the box for the median, and horizontal lines (called whiskers) extending out of the middle of each end of the box to the minimum and maximum. The modified boxplot extends the left line to the smallest value greater than the lower fence, and extends the right line to the largest value less than the upper fence.
