State the null and alternative hypotheses for each of the following scenarios: Scenario 1: Company A wants to find out if fewer customers visit Store 4 than Store 2 on average.
Scenario 2: Company B wants to see if those in the 26-34 age group spend on average a different amount than the 35-54 age group.
Scenario 3: Company C wants to find out if Team 3 produces batteries that, on average, last longer than those produced by Team 7.