(Answered) Calculate a 95 confidence interval for the following

Statistics

Calculate a 95% Confidence Interval for the following samples:
Xbar =450, N=200, σ=100
Xbar =105, N=50, σ=15
Xbar = 19, N = 17, s = 5
Xbar= 8, N = 40, s = 1.6
Xbar= 8.35, N = 30, s = 1.59
Calculate a 99% Confidence Interval for the following samples:
Xbar =525, N=110, σ=100
Xbar=305, N=85, σ=50
Xbar= 19, N = 17, s = 5
Xbar= 15, N = 60, s = 2.25
Xbar= 25.43, N = 50, s = 5.15

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