a small locally owned coffee in portland, oregon sells four different sizes of its most popular coffee drink. For the past several years, the proportion of drinks they sell of each size has been quite stable: 10% small, 14% medium, 61% large, and 15% jumbo. They decide to change the pricing for the four sizes and want to see if this changes the proportion of drinks they sell of each size. To test this, a few weeks after changing the prices they take a simple random sample of 240 transactions involving coffee drinks and count how many drinks of each size were sold.
