Question

"Conservationists have despaired over destruction of tropical rain forest by logging, clearing, and burning." These words begin a report on a statistical study of the effects of logging in Borneo. Researchers compared the number of trees growing on forest plots that had never been logged (Group A) with similar plots nearby that had been logged 1 year earlier (Group B) and 8 years earlier (Group C). All plots were 0.1 hectare in area. Here are the counts of trees for plots in each group:Group A: 27 22 29 21 19 33 16 20 24 27 28 19Group B: 12 12 15 9 20 18 17 14 14 2 17 19Group C: 18 4 22 15 18 19 22 12 12 "Create a boxplot for each of the three groups (side-by-side next to each other with space between each, OR stacked, one on top of the other). All three should use the same scale: be sure you use graph paper to help you with this.

Answer 1

The Box & Whisker Plot is ideal for comparing the distributions because the center, spread and overall range are immediately apparent.

Here end-points of Whisker show the lowest and largest observation of the data and end points of box shows the lower and upper quartile and line inside the box shows the Median of the data.

Thus Box Plot (also known as Box & Whisker Plot) is plotted by using the minimum value, 1st quartile, Median, 3rd quartile, Maximum Value (The five number summary).