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# Inference comparing two groups or populations

AP Stats: DAT (BI), DAT‑3 (EU), UNC (BI), UNC‑4 (EU), VAR (BI), VAR‑6 (EU)

AP Stats: UNC (BI), UNC‑4 (EU), UNC‑4.I (LO), UNC‑4.I.1 (EK), UNC‑4.J (LO), UNC‑4.J.1 (EK), UNC‑4.K (LO), UNC‑4.K.1 (EK)

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Conditions for inference on two proportionsGet 3 of 4 questions to level up!

Two-sample z interval for the difference of proportionsGet 3 of 4 questions to level up!

AP Stats: DAT (BI), DAT‑3 (EU), DAT‑3.C (LO), DAT‑3.C.1 (EK), DAT‑3.D (LO), DAT‑3.D.1 (EK), DAT‑3.D.2 (EK), UNC (BI), UNC‑4 (EU), UNC‑4.N (LO), UNC‑4.N.1 (EK), VAR (BI), VAR‑6 (EU), VAR‑6.H (LO), VAR‑6.H.1 (EK), VAR‑6.H.2 (EK), VAR‑6.H.3 (EK), VAR‑6.I (LO), VAR‑6.I.1 (EK), VAR‑6.J (LO), VAR‑6.J.1 (EK), VAR‑6.K (LO), VAR‑6.K.1 (EK)

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Writing hypotheses for testing the difference of proportionsGet 3 of 4 questions to level up!

Test statistic in a two-sample z test for the difference of proportionsGet 3 of 4 questions to level up!

P-value in a two-sample z test for the difference of proportionsGet 3 of 4 questions to level up!

Making conclusions about the difference of proportionsGet 3 of 4 questions to level up!

AP Stats: UNC (BI), UNC‑4 (EU), UNC‑4.V (LO), UNC‑4.V.1 (EK), UNC‑4.V.2 (EK), UNC‑4.W (LO), UNC‑4.W.1 (EK), UNC‑4.X (LO), UNC‑4.X.1 (EK), UNC‑4.X.2 (EK), UNC‑4.Y (LO), UNC‑4.Y.1 (EK), UNC‑4.Y.2 (EK)

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Conditions for inference on two meansGet 3 of 4 questions to level up!

Two-sample t interval for the difference of meansGet 3 of 4 questions to level up!

AP Stats: DAT (BI), DAT‑3 (EU), DAT‑3.H (LO), DAT‑3.H.1 (EK), DAT‑3.H.2 (EK), UNC (BI), UNC‑4 (EU), UNC‑4.AA (LO), UNC‑4.AA.1 (LO)

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Practice

Writing hypotheses to test the difference of meansGet 3 of 4 questions to level up!

Test statistic in a two-sample t testGet 3 of 4 questions to level up!

P-value in a two-sample t testGet 3 of 4 questions to level up!

Making conclusions about the difference of meansGet 3 of 4 questions to level up!