2/19/2020

Chapter 8 - Standardized Scores and Normal Distributions

• Creating z-scores with R
  • scale(x, center=TRUE, scale=TRUE)
  • z-score = (x-mean(x))/sd(x)
• Finding areas under Normal Curves - Modification to Exercise 1 on p. 290
  • Area to the left - pnorm(x, mean=___, sd=___)
  • Area to the right
  • Area between two values
  • Finding percentiles - qnorm( p, mean=___, sd=___)
• Relationship between Normal Curves and the Standard Normal Distribution.

In Class Exercises

Chapter 8 - Standardized Scores and Normal Distributions

• 8.1, 8.9, 8.23, 8.31

Reading Assignment - Please begin reading Chapter 9 for class on Friday.