Statistics question a.3

Statistics
Tutor: None Selected Time limit: 1 Day

Apr 24th, 2015

n1=15 s1=1.68

n2=10 s2=2.89

se= Sqrt(S^2pooled(1/15+1/10)=Sqrt(4.9862*.1667)=  .91

S^2 pooled=[(n1-1)s1^2 +(n2-1)s2^2]/n1+n2-2

=(14*1.68^2+9*2.89^2)/23=4.9862

Apr 24th, 2015

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