PSY 3060 Ohio Christian University Interpret Z Scores Discussion

Z Score Exercise

Interpret z scores.
The Z-test is one of the foundational tests of statistics. We often see z scores (the result of Z-tests) as a part of daily life. These include things like ACT and SAT scores as well as most IQ scores. The z scores are useful because they allow us to compare scores between completely different distributions; that is, distributions with different means and standard deviations. You will see this standard score used most frequently in statistics. It computes how much the amount of a raw score differs from the mean of the distribution by the standard deviation.

• Read Chapters 8 and 10 in your text.
• Watch the video about z scores. Z scores and Percentiles: Crash Course Statistics #18: https://www.youtube.com/watch?v=uAxyI_XfqXk&list=PL8dPuuaLjXtNM_Y-bUAhblSAdWRnmBUcr&index=20&t=0s
• Watch the video about how to calculate z-scores in Excel. Excel for Statistics 5 – Z-scores: https://www.youtube.com/watch?v=p4tFovMryyU
• Answer question 4 on p. 197 (Chapter 10). In this question, you will determine whether there is a significant difference in the number of flu cases. (Hint: you will need to use table B.1.)