Question 1187604
mean or point estimate is 2718.27 gm
s=639.11 gm
t(df=25, 0.975)=2.060
half-interval is t*s/sqrt(n)
=2.060*639.11/5
=263.31 gm
the interval s therefore (2455.96 gm, 2981.58 gm) or (2456, 2982) gm
No, since 2500 gm is in the CI, cannot conclude average birth rate is different from 2500 gm

Not clear why need five decimal places given the data, and I did not address that.