Question 257452
<pre><font size = 4 color = "indigo"><b>
List them in a column, like this

60
49
58 
45 
55 
62 
49

Subtract the mean, 54, from each one in the next column, like this

60   60 - 54 =  6
49   49 - 54 = -5
58   58 - 54 =  4 
45   45 - 54 = -9 
55   55 - 54 =  1
62   62 - 54 =  8 
49   49 - 54 = -5


Square these results in the next column

60   60 - 54 =  6   (6)<sup>2</sup> = 36
49   49 - 54 = -5  (-5)<sup>2</sup> = 25  
58   58 - 54 =  4   (4)<sup>2</sup> = 16 
45   45 - 54 = -9  (-9)<sup>2</sup> = 81  
55   55 - 54 =  1   (1)<sup>2</sup> =  1
62   62 - 54 =  8   (8)<sup>2</sup> = 64 
49   49 - 54 = -5  (-5)<sup>2</sup> = 25

Add those squares up, like this

60   60 - 54 =   6   (6)<sup>2</sup> = 36
49   49 - 54 =  -5  (-5)<sup>2</sup> = 25  
58   58 - 54 =   4   (4)<sup>2</sup> = 16 
45   45 - 54 = -10  (-9)<sup>2</sup> = 81  
55   55 - 54 =   1   (1)<sup>2</sup> =  1
62   62 - 54 =   8   (8)<sup>2</sup> = 64 
49   49 - 54 =  -5  (-5)<sup>2</sup> = 25
                         -----
                           248

There are 7 numbers.  Subtract 1, getting 6

Divide 248 by 6, getting 41.33333333

Take the square root of 41.33333333, getting 6.429100507

That's the standard deviation

Edwin</pre>