Calculate a 95% Confidence Interval for the following samples:

 Calculate a 95% Confidence Interval for the following samples:
x=450, N=200, σ=100
x=105, N=50, σ=15
x= 19, N = 17, s = 5
x= 8, N = 40, s = 1.6
x= 8.35, N = 30, s = 1.59

Calculate a 99% Confidence Interval for the following samples:
x=525, N=110, σ=100
x=305, N=85, σ=50
x= 19, N = 17, s = 5
x= 15, N = 60, s = 2.25
x= 25.43, N = 50, s = 5.15