Please explain the process as well, not just the answer. I know the answer is 37.45, but I do not know how to get it.

Please explain the process as well, not just the answer. I know the answer is 37.45, but I do not know how to get it.A company wants to determine if its employees have any preference among 5 different health plans. A sample of 200 employees provided the data below. Test the claim that there is no preference. Use α = 0.01. Two decimal places.Plan 1 2 3 4 5Employees 30 65 18 32 55