Question 1075628
1.Ho: sales decreased or remained the same. x<=
Ha: sales increased. x>
2. Ho: The blood pressure remained the same or increased.
Ha: the blood pressure decreased.
3. Ho: the number of conflicts stayed the same or increased.
Ha: the number of conflicts decreased.
In all cases, both hypotheses together should cover all possibilities without overlap. The null hypothesis typically shows no change or no change or worse.  The alternative hypothesis is everything else.
==========================
mean -2 sd is the critical value, which is 96-3(2)=90 oz the critical value.