Which hypothesis should be written as an inequality?

• the alternative hypothesis

• the null hypothesis

• either the null hypothesis or the alternative hypothesis

The null hypothesis and alternative hypothesis are written about...

• a population parameter

• sample data

• a sample statistic

Say as X̄ = 12, which of these is a correct null hypothesis?

• H0: μ = 12

• H0: μ > 12

• Ha: μ = 12

• Ha: μ > 12

Which of these is NOT a correct null hypothesis?

• • H ₀: μ ₁ = μ ₂

• • H ₀: μ ₁ – μ ₂ = 0

• • H ₀: μ ₁ < μ ₂

If H ₀: μ = 8, which of these is NOT a correct alternative hypothesis?

• • H _a: μ ≠ 8

• • H _a: μ ≤ 8

• • H _a: μ > 8