Solve the following problem, using One-way ANOVA. Please show your solution.

Four groups of 4 patients each was subjected to four different types of treatment for the same ailment. The following data are on the number of days that elapsed before they were completely cured. What conclusion may be drawn about the four types of treatment? Patient TreatmentA Treatment B Treatment C Treatment D 1 10 11 3 6 2 9 11 4 10 3 6 18 5 8 4 7 6 7 11