EA Practice Test 13

In March, Greystone Grocers, a fictional supermarket chain, installed self-checkout lanes at 6 of its 12 stores. At those 6 stores, the average checkout wait in April was 30% shorter than in February. The regional manager concluded that self-checkout lanes reduce checkout waits and recommended installing them at the other 6 stores. Select the statement that, if true, would most strengthen the manager's conclusion and the statement that, if true, would most weaken it. Select one answer for each part; the same choice may be used for both. Most strengthens: Select…Self-checkout machines cost more per month to maintain than staffed lanes cost to operate.At the six stores with self-checkout, average waits had been falling slightly for several months before March.In March, Greystone also added a second shift of cashiers at the six stores that installed self-checkout.In April, about 40% of transactions at the six stores went through the new self-checkout lanes.At the six stores without self-checkout, average waits were essentially unchanged from February to April. Most weakens: Select…At the six stores with self-checkout, average waits had been falling slightly for several months before March.In March, Greystone also added a second shift of cashiers at the six stores that installed self-checkout.At the six stores without self-checkout, average waits were essentially unchanged from February to April.Self-checkout machines cost more per month to maintain than staffed lanes cost to operate.In April, about 40% of transactions at the six stores went through the new self-checkout lanes.