Confidence Intervals and Tests Quiz

Pick the correct formula for z-interval.

• z = (x̄ - μ) / (σ/√n)

• t = (x̄ - μ) / (s/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for t-interval.

• z = (x̄ - μ) / (σ/√n)

• t = (x̄ - μ) / (s/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for 2-sample z interval.

• z = (x̄1 - x̄2) / √(σ1²/n1 + σ2²/n2)

• t = (x̄1 - x̄2) / √(s1²/n1 + s2²/n2)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for 2-sample t-interval.

• z = (x̄1 - x̄2) / √(σ1²/n1 + σ2²/n2)

• t = (x̄1 - x̄2) / √(s1²/n1 + s2²/n2)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for matched pair t-interval.

• d̄ = (Σd) / n

• t = (d̄ - μd) / (sd/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for 1-prop z-interval.

• p̂ ± z*√(p̂(1-p̂)/n)

• t = (x̄ - μ) / (s/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for 2-prop z-interval.

• (p̂1 - p̂2) ± z*√(p̂1(1-p̂1)/n1 + p̂2(1-p̂2)/n2)

• t = (x̄1 - x̄2) / √(s1²/n1 + s2²/n2)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for linear reg t-interval.

• y = mx + b

• t = (b - 0) / (se)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for z-test.

• z = (x̄ - μ) / (σ/√n)

• t = (x̄ - μ) / (s/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)

Pick the correct formula for t-test.

• z = (x̄ - μ) / (σ/√n)

• t = (x̄ - μ) / (s/√n)

• p̂ = x/n

• χ² = Σ((O - E)² / E)