Advantages and Disadvantages

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Presentation transcript:

Advantages and Disadvantages Types of Graphs Advantages and Disadvantages

Shows percent of total for each category Circle Graph Circle Graph displays data as a percentage of the whole. Each pie section should have a label and percentage. A total data number should be included. Disadvantages No exact numerical data Hard to compare 2 data sets "Other" category can be a problem Total unknown unless specified Best for 3 to 7 categories Use only with discrete data Advantages Visually appealing Shows percent of total for each category

Cannot read exact values because data is grouped into categories Histogram A histogram displays continuous data in ordered columns. Categories are of continuous measure such as time, inches, temperature, etc. Advantages Visually strong Usually vertical axis is a frequency count of items falling into each category Disadvantages Cannot read exact values because data is grouped into categories More difficult to compare two data sets Use only with continuous data

Shows a trend in the data relationship Scatter plot A scatter plot displays the relationship between two factors of the experiment. A line is used to determine positive, negative, or no correlation. Advantages Shows a trend in the data relationship Retains exact data values and sample size Shows minimum/maximum and outliers Disadvantages Hard to visualize results in large data sets Flat trend line gives inconclusive results Data on both axes should be continuous

Stem and Leaf Plot Stem and leaf plots record data values in rows, and can easily be made into a histogram. Large data sets can be accommodated by splitting stems. Advantages Concise representation of data Shows range, minimum & maximum, gaps & clusters, and outliers easily Can handle extremely large data sets Disadvantages Not visually appealing Does not easily indicate measures of centrality for large data sets

Not as visually appealing as other graphs Box and Whisker plot A box and whisker plot is a concise graph showing the five point summary. Multiple boxplots can be drawn side by side to compare more than one data set. Disadvantages Not as visually appealing as other graphs Exact values not retained Advantages Shows 5-point summary and outliers Easily compares two or more data sets Handles extremely large data sets easily