Answer:
0.6865
Step-by-step explanation:
test statistic is given by the formula
test statistic =[tex]\frac{\bar{x}-\mu }{\frac{\sigma }{\sqrt{n}}}[/tex]
where [tex]\bar{x}[/tex]= mean of the sample
μ= mean
n= sample space
σ= standard deviation
we have given mean of sample  [tex]\bar{x}[/tex] =69
mean μ=68.3
σ=11.4
sample space=125
putting all these value in formula of test statistic
test statistic=[tex]\frac{69-68.3}{\frac{11.4}{\sqrt{125}}}[/tex]
=0.6865
