A physical traiiner has 4 workout plans that he recommends for his clients. The workouts have been designed so that the average maximum heart rate achieved is the same for each workout. He randomly selects and assign 5 people to each of the 4 workout plans. During each workout he measures the maximum heart rate in beats per minute and obtains the following results.

Source of Variation	SS	df	MS	F
Treatment	423.96
Error	302.77
Total

The mean square for groups is _______ (use two decimal places)