Question 1195366
2 sample z-test
SE is sqrt (sigma 1^2/n1+sigma2^2.n2)=sqrt(2.6^2/64+2.76^2/54)=sqrt(0.2467)=0.50
z=diff in mean/SE
=-1.49/0.5
=-2.98 is the test stat
p-value=0.001
reject Ho at the 0.01 level.