n=60, H0: mean=0, HA: meangt;0,level of significance =5% (a) Using t distribution, critical value=1.671 (b) Using the table above(since the...

n=60, H0: mean=0, HA: mean>0,level of significance =5%

(a) Using t distribution, critical value=1.671

(b) Using the table above(since the df>30, so we use df=infinity), critical value=1.645

Comparing the answers to (a) and (b), for what range of values of t statistics would the hypothesis test conclusion differ between using the t or normal critical values? How practically important does this difference appear to be? Explain.