Stemplots
- Stemplots: All you need to know about this useful graphical display. Activities, worksheets and extension material are available from this page.
Dotplots
- Dotplots: Dotplots are often the neglected cousin in the family of graphical displays of data. But they are easy to construct and can tell us much about a dataset.
Histograms
- Histograms: Histograms are very useful, but care needs to be taken in constructing and interpreting them. Remarkably, research about histograms is still being conducted.
- Histogram Applet - The most significant variable in constructing a histogram is the bin or class width.
- Bin Width Applet - dynamically change the bin width to see the effect on the shape of the histogram.
- Bin Width Applet - dynamically change the bin width to see the effect on the shape of the histogram.
Measures of Center and Spread
- Measures of Location: So you think the mean, median and mode are boring? Well, maybe, but there are some interesting little side alleys to this topic that are worth exploring.
- Measures of Spread: Visit here, and you will learn about some vary useful statistics.
- Compare Mean and Median: Draw histograms to explore the relationship between mean, median, and shape.
- A comprehensive overview of Mode, Median, Mean, Central Tendency, Variation, Range, Variance, and Standard Deviation.
Boxplots
- Boxplots: Visit this page and you may possibly learn more than you ever wanted to know about boxplots.
- Guess the summary - for various distributions, guess the mean, median and spread.
- Compare Distributions - Gather data from yourself (How fast can you click a mouse accurately) and then compare the boxplots representing your results.
Density Curves
- Density Curves presentation
Normal Distribution
- Normal Distribution: Discover the link between the 1.5*IQR Rule and the normal distribution, and why you should use light bulbs to burn those traditional statistics textbooks.
- Normal Distribution presentation
Normal Probability Plots
- Learn more about Normal Probability Plots (used to determine if a dataset is normal)
Review
- Correct your answers to the multiple choice review packets here.
- Descibing the shape of distributions.
- See one of the worst graphical display of all time. The click here to see the real data. It is not as pretty, but at least it's the truth.
