The first of two samples has 100 items with mean 15 and SD 3. If the whole group has 250 items with mean 15.6 and \[SD=\sqrt{13.44}\] the SD of the second group is

The first of two samples has 100 items with mean 15 and SD 3. If the w

1.	The first of two samples has 100 items with mean 15 and SD 3. If the whole group has 250 items with mean 15.6 and \[SD=\sqrt{13.44}\] the SD of the second group is
A.	5
B.	4
C.	6
D.	3.52
Answer» C. 6

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The first of two samples has 100 items with mean 15 and SD 3. If the whole group has 250 items with mean 15.6 and \[SD=\sqrt{13.44}\] the SD of the second group is

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