Question 1190194
Ho: mean is >=8 years
Ha: mean is <8 years
alpha=0.05 p{reject Ho|Ho true}
test is a one sample t-test with left tail 0.05 df=22
critical value t<-1.717
t=(7.4-8)/6/sqrt(23)
=-0.6*sqrt(23)/6=-0.48
fail to reject Ho p-value = 0.31
insufficient evidence to conclude that the tenure is fewer than 8 years.