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[" 1) "2sqrt(2)],[" The first of two sam...

[" 1) "2sqrt(2)],[" The first of two samples has "100" items with mean "15" and standard deviation "3" .If the whole "],[" roup has "250" items with mean "15.6" and "s.d sqrt(13.44)" then s.d of second group is "],[[" 4."," (coup has "250" items with mean "15.6" and s.d "sqrt(13.44)" then s.d of second group is "," 4) "2]]

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