Class A Class B Class C
80 72 100
85 90 90
87 85 94
92 84 100
86 91 75
90 78 30
94 94 94
100 86 72
75 82 85
45 78 87
85 86 42
38 78 100
72 95 90
94 90 94
62 88 60
what are the means and standard deviations of A and B?

Question

Class A Class B Class C
80	      72	  100
85	      90	   90
87	      85	   94
92	      84	   100
86	      91	    75
90	      78	    30
94	      94	    94
100	      86	    72
75	      82	    85
45	      78	    87
85	      86	    42
38	      78	    100
72	      95	    90
94	      90	    94
62	      88	    60
what are the means and standard deviations of A and B?

tkhunny · Answer

Have you considered calculating these values?  There are formulas for this sort of thing.  Please show your work.

e.mccormick · Answer

If you have trouble finding how to do it, we can talk about that.

tkhunny · Answer

I'm relatively sure you can add the column and divide by the number of entries int eh column.  Magically, the Mean will appear.

e.mccormick · Answer

Yah, the fun is the SD.