Inference Tutor Help
Build and interpret confidence intervals, set up hypotheses, compute test statistics and p-values, and conclude without overclaiming.
1 Concept recap
The essentials of Confidence Intervals & Hypothesis Testing, on one screen.
1 Concept recap
CI
Estimate ± z*×SE. z*: 1.645 / 1.96 / 2.576 for 90 / 95 / 99%.
Interpretation
“95% confident the true parameter is in the interval.” Never “95% chance”.
Tests
H0 has =. z = (x̄−μ0)/SE. p < α → reject H0; “convincing evidence”, not proof.
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