Question 650115
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
 SD = {{{sqrt(76.9)}}}
x	m	(x-µ)	(x-µ)^2	
20.2	30	-9.80	96.040	
22.4	30	-7.60	57.760	
30	30	0.00	0.000	
37.6	30	7.60	57.760	
39.8	30	9.80	96.040	
150			307.600	sum
30.00		sum/4	76.900	Variance