Question 1171767
Ho: average SAT score is 1350
Ha: it is not 1350
alpha=0.05 p{reject Ho|Ho true}
test stat t(0.975, df=120)=(x bar-mean)/s/sqrt(n)
critical value |t|>1.98
calculation (-50*sqrt(121)/40)=t=-13.75
strongly reject Ho and conclude the true SAT score is not 1350.