Mean, Variance & Standard Deviation
by Anonymous
Move five data points on a dot plot to see why the deviations sum to zero and how variance and standard deviation follow.
#math#average#variance#standard_deviation#middleschool#grade9#mathpractice#middleschool_math#education
About this app
An interactive middle-school statistics app for exploring the mean, deviation, variance, and standard deviation of five data values. Adjust the values and observe why deviations always sum to zero, how the mean is calculated, and how greater spread increases variance and standard deviation. Guided missions and a quiz provide practice with these concepts.
Use cases
- Middle-school students learning mean and measures of spread
- Teachers demonstrating deviation and variance interactively
- Learners practicing calculations with five-value data sets
- Reviewing mean, variance, and standard deviation before a math assessment
Features
- Adjust five data values with increment and decrement controls
- Displays the mean and each value’s deviation
- Calculates squared deviations, variance, and standard deviation
- Guided missions for targeting specific means, variances, and ranges
- Four-question challenge quiz with answer streak tracking