Question

The following stem-and-leaf plot is constructed using data collected from the speed (km/h) of cars passing through an intersection. Data values were rounded to one decimal place.

Answer 1

A stem-and-leaf plot is a data visualization tool that organizes numerical data into groups to show the distribution of values. It consists of a vertical line with stems (leading digits) on the left and leaves (trailing digits) on the right. The stem-and-leaf plot provides a quick and detailed picture of the data, allowing us to identify patterns, outliers, and concentration of values.

Step-by-step explanation:

A stem-and-leaf plot is a data visualization tool that organizes numerical data into groups to show the distribution of values. It consists of a vertical line with stems (leading digits) on the left and leaves (trailing digits) on the right. Each stem represents a group of values, and the leaves correspond to individual data points. The stem-and-leaf plot provides a quick and detailed picture of the data, allowing us to identify patterns, outliers, and concentration of values.

For example, if we have a stem-and-leaf plot of car speeds:

5 | 6

4 | 0 2 5 5 7 8

3 | 2 3 3 5 8

2 | 3 5 7

1 | 1 5

This plot shows that there is a concentration of car speeds around 40-50 km/h (stem 4) and 30-40 km/h (stem 3), while the other stems have fewer values. It also indicates that there are some outliers, such as the car with a speed of 56 km/h.