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Frequency Distributions and Graphs

Pie Chart

  • Include a key (legend)

  • Use different colors for different sections

  • Sections should add up to 100%​

Histogram

  • Measure quantitative data

  • Data is split into bins or classes

  • Class width=(Highest Point-Lowest Point) / Number of Bins

Stem and Leaf Plot

  • "Stem" values are listed vertically, and "leaf" values are listed horizontally 

  • A legend is needed to show how to read the data

Ogive

  • Graphs cumulative frequencies

  • Cumulative frequency is the sum of all frequencies up to a certain point

  • Relative frequency is the frequency at a certain point in time divided by the total frequency

Box and Whisker Plots

  • Provides clear means of what the quartiles are (Q1, Median, Q3)

  • Shows range of data (minimum and maximum)

  • Box outlines the interquartile range

  • Interquartile Range (IQR)= Q3-Q1

  • How to find Outliers:

    • Q1-(1.5)IQR

    • Q3+(1.5)IQR

    • If a data point is outside of this range, the point is an outlier

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Hours and Location of Stat Tutoring Lab:

The Mathematics Tutoring Lab is located in the Science and Math Complex room 357. Dunkin Donuts side, 3rd Floor, at the end of the hallway.

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Monday-Thursday 4:00pm-8:00pm

Hours may differ for weeks with breaks 

Not open during convocation or finals week

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