Question

Describe how to construct a​ stem-and-leaf plot from a set of data. Assume that the data consist of​ two-digit numerical values.

Choose the correct answer below.

A.

​First, organize the data into several​ classes, such as​ 40-49, 50-59, and so on.​ Then, tally the number of data items in each​ class, and determine the percentage of the population occupied by each class. Draw a​ circle, and divide the circle into portions representing the percentage for each class.

B.

The plot is constructed by separating each data item into two parts. The first part is the stem. The stem consists of the tens digit. The second part is the leaf. The leaf consists of the units digit for a given value. Write all of the leaves in the first column.​ Then, write each stem in the second​ column, writing the stem of each data item in the row corresponding to its associated leaf.

C.

​First, organize the data into several​ classes, such as​ 40-49, 50-59, and so on.​ Then, tally the number of data items in each class. In the first​ column, record the limits for each class. In the second​ column, record the number of data items in each class.

D.

The plot is constructed by separating each data item into two parts. The first part is the stem. The stem consists of the tens digit. The second part is the leaf. The leaf consists of the units digit for a given value. Write all of the stems in the first column.​ Then, write each leaf in the second​ column, writing the leaf of each data item in the row corresponding to its associated stem.

Answer 1

Correct option : D. The plot is constructed by separating each data item into two parts. The first part is the stem. The stem consists of the tens digit. The second part is the leaf. The leaf consists of the units digit for a given value. Write all of the stems in the first column.​ Then, write each leaf in the second​ column, writing the leaf of each data item in the row corresponding to its associated stem.

Example of a stem and leaf plot :