StatPiThe arithmetic, done. The thinking, yours.
You type the numbers from your problem. StatPi picks the sheet, does the arithmetic and writes out every step between the formula and the answer, with a plain note wherever a step needs a reason.
Works in your phone's browser. No account to make.
Below 0.05: significant at the 0.05 level.
See the step that would have tripped you up.
- Say what you are trying to find outHome asks the question in plain words first, the test name second. "Is this coin fair?" before "chi-square, goodness of fit."
- Put your numbers inType them, paste a column, or join your class and send your data from your phone.
- Read the working, not just the answerEvery result carries its worked steps in a fixed-width column, the way you would write them on paper.
(31 − 25)² / 25 = 1.440
chi-square 2.880, df 1
p = 0.0897
Squared, so a gap above and a gap below both count.
Not significant at 0.05. At 0.10 it would be.
One result on the projector. Thirty phones sending data.
Live class sessions
Start a session, show one code, and every phone in the room sends its numbers to your screen. No wifi? Each phone shows a code you scan.
The working on the board
Put one result up for the room and talk through each step. The steps are the same ones your students see on their phones.
Built at the front of a room
The idea came from a statistics professor who taught intro biostatistics for more than twenty years: teach statistics, not how to be a statistician. Meet him.
Start free. Open the rest when your course gets there.
StatPi Lite
One variable: put it in, describe it, and work the binomial, Poisson and normal sheets.
Open LiteStatPi Pro
Two variables and regression, categories, the t, chi-square and F sheets, Bayes' rule, intervals and tests, ANOVA, and live class sessions. One purchase, no subscription.
See pricingBring the problem that is due this week.
Two hours of live statistics office hours with Professor Paul Weiss, PhD. Send your problem ahead and it may get worked on screen, step by step.