Given that the sample mean, x̄, is 20 and the population standard deviation, σ, is 5, with a sample size, n, of 33. At a 95% confidence level, the value of z is α = 1 - 95% = 1 - 0.95 = 0.05. α/2 = 0.05/2 = 0.025. Zα/2 = Z0.025 = 1.96. I don't understand what I'm supposed to do with the Z table to get the value of 1.96. If I knew the process here, I could solve these problems without any issues. Please explain...