Question 1171765
Ho:earn >=40 K
Ha: earn < 40 K
alpha =0.05 p{reject Ho|Ho true}
test stat is a t (0.95,df=15), one way test
critical value t < -1.753
calculation t=(x bar-40000)/10000/sqrt(16)
=-10000*4/10000
=-4
reject Ho and conclude they earn fewer than 40K
p-value < 0.0006