Question 1119177
This is a 2 sample t-test.  Assume normality and variances may be considered homogeneous
Ho: mu1>=mu2 or mu1-mu2>=0
Ha: mu1< mu2 or mu1-mu2<0
alpha=0.05
test stat is a t 0.975, df=12
critical value |t|<-1.782
t= (mu1-mu2)/sqrt((s1^2)/(n1-1))+(s2^2)/(n2-1))
t=(118.43-119.71)/sqrt((14.13/6)+(3.5/6))
=-1.28/sqrt(2.355+0.583)
=-1.28/5.94
=-0.2155
Fail to reject Ho at the 0.05 level. Insufficient evidence to say whether there has been a change.