The table below lists days of the week selected by a random

The table below lists days of the week selected by a random sample of 984 subjects who were asked to identify the day of the week that is best for quality family time. Consider the claim that the days of the week are selected with a uniform distribution so that all days have the same chance of being selected. If we test the claim using the goodness-of-fit test, what is actually tested?

Sun Mon Tues Wed Thurs Fri Sat

512 23 8 17 11 39 374