Graphs

Question 1

What is Stem-and-Leaf Plot?

Answer 1

• The stem is leading digit(s) and the leaf is the trailing digit.
• The stem is placed at the first column and the leaf is at the second column.

Question 2

A statistician who introduced the stem-and-leaf-plot.

Answer 2

John Tukey

Question 3

• Graph in which the classes are marked on the horizontal axis and the class frequencies on the vertical axis.
• The height of the bars represents the class frequencies, and the bars are drawn adjacent to each other. Focuses on the frequency of each class.

Answer 3

Histogram

Question 4

• Graph that displays the data using points which are connected by lines.
• The vertical axis represents the frequency of the distribution while the horizontal axis represents the midpoints of the frequency distribution.

Answer 4

Frequency Polygon

Question 5

• Graph that displays the cumulative frequencies for the classes in a frequency distribution.
• The vertical axis represents the cumulative frequency of the distribution while the horizontal axis represents the upper class boundaries of the frequency distributions.

Answer 5

Cumulative Frequency Polygon (Ogive)

Question 6

used to represent a frequency distribution for a categorical data and frequencies are displayed by the heights of vertical bars, which are arranged in order from highest to lowest.

Answer 6

Pareto Chart

Question 7

similar to bar histogram. The bases of the rectangles are arbitrary intervals whose centers are the codes.

Answer 7

Bar Chart (Bar Graph)

Question 8

circle divided into portions that represent the relative frequencies of the data belonging to different categories.

Answer 8

Pie Chart (Circle Graph)

Question 9

represents data that occur over a specific period of time under observation. In addition, it shows a trend or pattern on the increase or decrease over the period of time.

Answer 9

Time Series Graph

Question 10

immediately suggests the nature of the data being shown. It is a combination of attention-getting quality and the accuracy of the bar chart.

Answer 10

Pictograph (Pictogram)

Question 11

used to examine possible relationships between two numerical values. The two variables are plot in x-axis and y-axis.

Answer 11

Scatter Plot

Question 12

7 Guidelines for Developing Good Graph/Charts

Answer 12

1. The graph/chart should include title.
2. The scales for all axes should be excluded.
3. The scale on the y-axis should start at zero.
4. The graph/chart should not be disfigure the data.
5. The x-axis and y-axis should be properly labeled.
6. The graph/chart should not contain unnecessary decorations.
7. The simplest possible graph/chart should be used for any data set.