Question

3.For a standard normal distributed variable, what is the probability Z is between 0 and -1.68?

4.For a standard normal dataset, what is the probability Z is less than -2.0? Round to four decimals and use leading zeros.

5.So where does the Empirical rule come from?  In symmetrical continuous data, a Z-transformed dataset has μ = 0, and σ =1. This is also called a Standard Normal or standardized distribution.What is the probability that a value falls in the interval μ ± 1σ, that is compute the probability P(-1 < Z < 1).  Round to four decimals and use leading zeros.

Answer 1