Question 1155919
Ho: Weight is 9.0 gm  or above
Ha: Weight is below 9.0 gm 
alpha=0.01 P{reject Ho|Ho true}
test statistic is a t df=7 0.995
critical value t<3.499
calculation t=(8.8-9)/0.23/sqrt(8)
=-0.2*sqrt(8)/0.23=-2.45. Fail to reject Ho.
Conclude that at the 1% level that there is insufficient evidence to say that the filling is not 9.0 gm. (p-value=0.022)