and Median. A
comparison between the mean and median is shown as you paint a
Probability Calculator. Probabilities
calculated and drawn from a standard normal distribution between two
Approximation to the Binomial. For certain values from a
binomial distribution, the binomial probability is compared to its
As balls fall through a field of pins they are
at the bottom and form an approximate normal (or binomial where p =
Distributions and the Central Limit Theorem
Distribution. This is a very nice
You are allowed to choose a parent population (normal, uniform, skewed
or custom) from which to draw. Different different types of
distribution can then be formed.
Dice. You control the number of dice and how many times they
are rolled. A relative frequency histogram of the results is
Rolling Dice. Similar to the previous dice applet except the
vertical axis on the frequency histogram remains at a constant scale.
Points. A scatterplot with a regression
line are given and you are allowed to add an additional point to see
affect it has on the regression line and the correlation.
and Residuals. You plot your own points with the mouse and a
regression line with vertical error lines is made. A residual
is also constructed.
Regression and Correlation. A scatterplot is given and 5
correlation values are shown. You are to estimate which
is correct and draw in the regression line. The correct answers
correlations. Four scatterplots and four correlations are
You have to match them up. You can repeat this process to see
percent you can get correct.
Points. You are allowed to plot your own points and the
equation and correlation are calculated throughout the process.
Intervals for a Population Mean.
is done from a population with a mean of 50 and a population of
You can adjust the sample size and then 100 samples are then
For each of these samples, 95% and 99% confidence intervals are
and shown graphically.
Interval for a Population Proportion.
a specified sample size and population proportion, a large number of
are taken and 95% confidence intervals are calculated. The number
of intervals that contain the population proportion is then
You see how both the sample size and the population proportion affect
of Proportions. You can adjust the alpha level, the form of
hypotheses, or make p different from p0.
Sixty samples of size 30 are then drawn. The applet graphically
the samples where the null is rejected as well as those where the null
is not rejected.
Marble Grabber. You can draw marbles out of a bag and a
test statistic is calculated on the premise that the colors are evenly
Diagram Applet. A Venn diagram for two non-disjoint
sets are shown within the universal set S. You can choose from 16
different subsets of S. Your subset will then be shaded on the
Make a Deal. The classic Monty Hall problem - should I stick
Needle Problem. In playing this old classic you can
the value of pi.
- Pass the Pig.
A game in which "pigs" are tossed and a score is given as to how they