Answer: H1: µd ≥ 0
Step-by-step explanation: The alternative alternative hypothesis usually denoted as H1 or Ha is aimed at discrediting the null hypothesis which usually takes the stance that no statistical significance exist between two compared variables and that observed differences are due to sampling error. In a bid to negate the null hypothesis and establish that statistical significance exists and in fact the observed variation aren't just due to sampling error.
In the context above, to determine if LIFO result in a lower cost of inventory than FIFO, THE NULL hypothesis will be ; H0: µd ≤ 0 while the alternative hypothesis will be ; H1: µd ≥ 0.