# Using either Table A or your calculator or software, find the proportion of observations from a...

## Question:

Using either Table A or your calculator or software, find the proportion of observations from a standard Normal distribution that satisfies each of the following statements. (Round your answers to four decimal places.)

(a) Z > 2.08

(b) Z < 2.08

(c) Z > ?0.68

(d) ?0.68 < Z < 2.08

## Finding Probabilities Under Normal Curve:

Standard normal curve is a bell-shaped curve that gives probabilities (proportions) random variables assumes in a continuous distribution. The random variables are standardized into z scores that gives number of standard deviations they take below or above the mean.

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#### a).

{eq}Z>2.08=1-z<2.08 {/eq}

On a z table, locate 2.0 on the left most column and move along the row up to column with 0.08 and get the...

Using the Normal Distribution: Practice Problems

from

Chapter 6 / Lesson 9
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In this lesson, we will put the normal distribution to work by solving a few practice problems that help us to really master all that the distribution, as well as Z-Scores, have to offer. Review the concepts with a short quiz at the end.