Construct a confidence interval forassuming that each sample is from a normal population.

(a)x

x

= 29,= 4,n= 13, 90 percentage confidence.(Round your answers to 2 decimal places.)

The 90% confidence interval is fromto.

(b)x

x

= 137,= 12,n= 25, 99 percentageconfidence.(Round your answers to 2 decimal places.)

The 99% confidence interval is fromto.

(c)x

x

= 13.3,= 1.6,n= 54, 95 percentage confidence.(Round your answers to 3 decimal places.)

The 95% confidence interval is fromto.