=+7. An analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as at the branch located near the mall. He selects 100 transactions at random from each branch and researches the age information for the associated customer.

Here are the data:

Age Less than 30 30–55 56 or Older Total In-Town Branch 20 40 40 100 Mall Branch 30 50 20 100 Total 50 90 60 200