Question 1140862
Ho:mothers get >=8 hours
Ha: they get fewer than 8 hours
alpha=0.05 P{reject Ho|Ho true}
test statistic t df=150 0.975
critical value is t< -1.98
t=(7.8-8)/1.4/sqrt(151)
=-0.2*sqrt(151)/1.4
=-1.76
Fail to reject Ho. Insufficient evidence to sate they get less than the recommended hours of sleep.