Ch6_Normal Distribution & Probability

Ch6_Normal Distribution & Probability - Chapter 6...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 6 The Normal Distribution, Probability and Standard Scores
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Normal Distribution Normal distribution is crucial theoretical mathematical distribution used in statistics. Also call “Gaussian distribution,” Bell curve.
Background image of page 2
The Normal Curve μ -3 σ -2 -1 +1 +2 +3 .3413 .3413 .1359 .1359 .0215 .0215
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Normal Curve Characteristics of a normal distribution: smooth symmetrical bell-shaped unimodal asymptotic (tails never touch base line) continuous
Background image of page 4
Why Normal Curve Is Important? Many of the variables measured in science research have distributions that quite closely approximate the normal curve. Many of the statistics used in summarizing data have sampling distributions that become normal with increasing sample size.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Equation of the Normal Curve : The Normal Curve is a bell shaped curve that is described by the following equation : where, Y = frequency of a given value of X X = any score in the distribution 2200 μ = mean of the distribution 2200 σ = standard deviation of the distribution N = total frequency of the distribution 2200 π = a constant of 3.1416 e = a constant of 2.7183
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Horizontal Axis: The horizontal axis gives you the values of the variable of interest in a  particular research project. It might be  values of IQ or blood pressure or substance use behavior  score. 
Background image of page 8
Vertical Axis: The height of the Normal Probability curve is 
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 30

Ch6_Normal Distribution & Probability - Chapter 6...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online