Chapter 7 - Hypothesis Testing with One Sample - Section 7.1 Introduction to Hypothesis Testing - Exercises - Page 361: 51

a. In this case, we want to support the claim, so the alternative hypothesis should represent the claim. Hence: Null Hypothesis: $H_{o}: μ \geq 15$ Alternative Hypothesis: $H_{o}: μ \lt 15$ b. a. In this case, we want to reject the claim, so the null hypothesis should represent the claim. Hence: Null Hypothesis: $H_{o}: μ \leq 15$ Alternative Hypothesis: $H_{o}: μ \gt 15$

As given above