Statistics question a.3


label Statistics
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Apr 29th, 2015

first compute for pooled s^2 =[ s1^2(n1-1) +s2^2(n2-1)]/n1+n2-2 =[31*31*8+41*41*13]/21=1407--->s= 38

se= 38*sqrt(1/9+1/14)= 16

Apr 29th, 2015

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Apr 29th, 2015
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Apr 29th, 2015
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