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# Confidence intervals

AP Stats: UNC (BI), UNC‑4 (EU)

AP Stats: UNC (BI), UNC‑4 (EU), UNC‑4.A (LO), UNC‑4.A.1 (EK), UNC‑4.F (LO), UNC‑4.F.1 (EK), UNC‑4.F.2 (EK), UNC‑4.F.3 (EK), UNC‑4.F.4 (EK)

AP Stats: UNC (BI), UNC‑4 (EU), UNC‑4.A (LO), UNC‑4.A.1 (EK), UNC‑4.B (LO), UNC‑4.B.1 (EK), UNC‑4.B.2 (EK), UNC‑4.C (LO), UNC‑4.C.1 (EK), UNC‑4.C.2 (EK), UNC‑4.C.3 (EK), UNC‑4.C.4 (EK), UNC‑4.D (LO), UNC‑4.D.1 (EK), UNC‑4.D.2 (EK), UNC‑4.F (LO), UNC‑4.F.4 (EK), UNC‑4.G (LO), UNC‑4.G.1 (EK), UNC‑4.H (LO), UNC‑4.H.1 (EK), UNC‑4.H.2 (EK)

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Practice

Conditions for a z interval for a proportionGet 3 of 4 questions to level up!

Finding the critical value z* for a desired confidence levelGet 3 of 4 questions to level up!

Calculating a z interval for a proportionGet 3 of 4 questions to level up!

Sample size and margin of error in a z interval for pGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

AP Stats: UNC (BI), UNC‑4 (EU), UNC‑4.O (LO), UNC‑4.O.1 (EK), UNC‑4.O.3 (EK), UNC‑4.P (LO), UNC‑4.P.1 (EK), UNC‑4.Q (LO), UNC‑4.Q.1 (EK), UNC‑4.Q.2 (EK), UNC‑4.Q.3 (EK), UNC‑4.R (LO), UNC‑4.R.1 (EK), UNC‑4.R.2 (EK), UNC‑4.T (LO), UNC‑4.T.1 (EK), UNC‑4.U (LO)

Learn

Practice

Conditions for a t interval for a meanGet 3 of 4 questions to level up!

Finding the critical value t* for a desired confidence levelGet 3 of 4 questions to level up!

Calculating a t interval for a meanGet 3 of 4 questions to level up!

Sample size and margin of error in a confidence interval for a meanGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

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Level up on all the skills in this unit and collect up to 800 Mastery points!#### Unit test

### About this unit

Confidence intervals give us a range of plausible values for some unknown population parameter based on results from a sample. This unit covers confidence intervals for means and proportions using data from one sample.AP® is a registered trademark of the College Board, which has not reviewed this resource.