Completing all six steps of hypothesis testing for a chi-square goodness-of-fit test.

A consumer psychologist, Dr. Wessells, obtained a random sample of 880 people who had strong preferences as to what cola they preferred. He gave each one, individually, a taste test in which each participant tasted four different colas and then had to pick his or her favorite. Dr. Wessells wondered whether consumers would be able to tell the difference. If they couldn’t, they would have a 25% chance of being right and a 75% chance of being wrong. It turned out that 279 participants correctly chose their preferred cola and 601 chose incorrectly. Use hypothesis testing to decide if all colas taste the same, even to people who have strong preferences.