In §6.2 we are introduced to the Normal Probability Distribution and the special case of the Normal Probability Distribution, the Standard Normal Probability Distribution, which is a Normal Probability Distribution with mean (u) zero and variance (σ2) one.

One way to find probabilities from a Standard Normal Distribution is to use probability tables, which are located inside the front cover of your textbook.

What is a z value?

What is the purpose of a z value?

According to the table, what is the probability when z ≤ -1.75? The probability when z ≤ 1.75? How did you find the values?

What are the values in this table representing?

What properties of probability distributions and specifically the Normal Probability Distribution do you notice from the two probabilities that you have found in the table?

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