2.1 Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs
Splitting values into stems and leaves so a small data set stays readable, and choosing line or bar displays for counts across categories.
Statistics, 2.1 Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs
9 exercises
2.1 Exercise 1
For the Park City basketball team, scores for the last 30 games were as follows (smallest to largest):
32, 32, 33, 34, 38, 40, 42, 42, 43, 44, 46, 47, 47, 48, 48, 48, 49, 50, 50, 51, 52, 52, 52, 53, 54, 56, 57, 57, 60, 61
Construct a stemplot for the data.
2.1 Exercise 2
The data are the distances (in kilometers) from a home to local supermarkets. Create a stemplot using the data.
1.1, 1.5, 2.3, 2.5, 2.7, 3.2, 3.3, 3.3, 3.5, 3.8, 4.0, 4.2, 4.5, 4.5, 4.7, 4.8, 5.5, 5.6, 6.5, 6.7, 12.3
Do the data seem to have any concentration of values?
The leaves are to the right of the decimal.
2.1 Exercise 3
The data below show the distances (in miles) from the homes of high school students to the school. Create a stemplot using the following data and identify any outliers.
0.5, 0.7, 1.1, 1.2, 1.2, 1.3, 1.3, 1.5, 1.5, 1.7, 1.7, 1.8, 1.9, 2.0, 2.2, 2.5, 2.6, 2.8, 2.8, 2.8, 3.5, 3.8, 4.4, 4.8, 4.9, 5.2, 5.5, 5.7, 5.8, 8.0
Presidential Ages at Inauguration
A side-by-side stem-and-leaf plot allows a comparison of the two data sets in two columns. In a side-by-side stem-and-leaf plot, two sets of leaves share the same stem. The leaves are to the left and the right of the stems. the table and the table show the ages of presidents at their inauguration and at their death. Construct a side-by-side stem-and-leaf plot using these data.
2.1 Exercise 5
The table shows the number of wins and losses a sports team has had in 42 seasons. Create a side-by-side stem-and-leaf plot of these wins and losses.
2.1 Exercise 11
the table is a two-way table showing the types of pets owned by men and women.
Given these data, calculate the marginal distributions of pets for the people surveyed.
2.1 Exercise 12
the table is a two-way table showing the types of pets owned by men and women.
Given these data, calculate the conditional distributions for the subpopulation of men who own each pet type.
2.1 Exercise 13
For each of the following data sets, create a stemplot and identify any outliers.
The miles-per-gallon ratings for 30 cars are shown below (lowest to highest):
19, 19, 19, 20, 21, 21, 25, 25, 25, 26, 26, 28, 29, 31, 31, 32, 32, 33, 34, 35, 36, 37, 37, 38, 38, 38, 38, 41, 43, 43.
2.1 Exercise 15
For each of the following data sets, create a stemplot and identify any outliers.
The data are the prices of different laptops at an electronics store. Round each value to the nearest 10.
249, 249, 260, 265, 265, 280, 299, 299, 309, 319, 325, 326, 350, 350, 350, 365, 369, 389, 409, 459, 489, 559, 569, 570, 610
Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.