Assuming the distribution being sampled is approximately normally distributed, use the small sample confidence interval for the mean to compute a

(a) 90% upper bound confidence interval for ???? when ???? = 31, ????̄ = 761.4, and ???? =

80.9.

(b) 95% upper bound confidence interval for ???? when ???? = 80, ????̄ = 0.18, and ???? =

0.06.

(c) 99% upper bound confidence interval for ???? when ???? = 65, ????̄ = 137.0, and ???? =

21.2.