Question 1056586
Ho-mean is 4.5
Ha-mean is not 4.5
alpha=0.01
test is a t 0.995, df=48 
t=(xbar-mu)/s/sqrt(n)
critical value=2.6822
reject Ho for |t|>2.6822
t=(4.5-5.1)/1.2/sqrt(49)=-4.2/1.2=-3.5
reject Ho, p-value=0.001
The claim is supported at the 1% level