Lesson 6: Graphs Of Frequency Distribution Flashcards
What are the 8 Graphs of Frequency Distribution
- Stem-and-Leaf Plot
- Pareto Chart
- Bar Graph
- Pie Chart
- Time Series Graph
- Pictograph
- Heat Map
- Scatter Plot
A statistician named — introduced the stem-and-leaf plot. The objective of this method is to some extent overcome the loss of actual observations brought about by the histogram.
John Tukey
is the leading digit or digits,
Stem
is the training digit.
Leaf
Placed at the first column
Stem
Placed in the second column
Leaf
It is a graph used to represent a frequency distribution for a categorical data (or nominal-
level) and frequencies are displayed by the heights of vertical bars, which are arranged in order from highest to lowest.
Pareto Chart
It displays data by using bars of equal width on a grid. The bars may be vertical or horizontal. Bar graphs are used for comparisons.
• It displays a bar for each category with the length of each bar representing the frequency of that category.
Bar Graph
It is a circle divided into portions that represent the relative frequencies (or percentages) of the data belonging to different categories. The data in a pie chart should be categorical or nominal-level.
Pie Chart
It represents data that occur over a specific period under observation. It shows for a trend or pattern on the increase or decrease over the period.
Time Series Graph
It uses pictures or icons relating to the main topic to visualize a small dataset.
• Moreover, it is a combnation of the attention-getting quality and the accuracy of the bar chart.
• It is appropriate pictures arranged in a row present the quantities for comparison.
Pictograph
It represents data density in colors. The bigger the number, the more color intene the data will be presented.
Heat Map
It is used to examine possible relationships between two numerical variables. The two variables are plot in x-axis and y-axis.
Scatter Plot
