Lemma
EasyChi-square tests
OpenStax, Statistics §11.2 Goodness-of-Fit Test · Example 5 · Statistics · Chi-square tests

Goodness-of-Fit Test · Example 5

Suppose you flip two coins 100 times. The results are 20 HH, 27 HT, 30 TH, and 23 TT. Are the coins fair? Test at a 5 percent significance level.

Its source prints no answer for this problem, so there's nothing to check against.

~5 minWritten answer · check your work with Lemma

OpenStax, Statistics · §11.2 Goodness-of-Fit Test · Example 5

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.