A sample of3 measurements are taken and recorded: a: = 9, y = 10 and z = 5 z+y+z _ The sample mean is: E = 3 8.00 Fill in the table below. s2 = (x')2+(y'f)2+(z'5)2 = Ex: 5.34 _ 2 _ 2 _ 2 s: (\" w) W 2\"\") H7\" \" = Ex: 5.34