Health Sciences 3801A/B Lecture 2: Lecture 2 - Introduction to Hypothesis Testing

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 3801A/B
• Professor: Andrew Johnson

Document Summary

The easiest ways to convert scales is to use standard scores. Although the range is from negative infinity to positive infinity, this is dependent on the range of the variable. If the variable has a range from negative infinity to positive infinity, z will have a large range. Typically thinking about a population when using z-scores. Both scales are measured on different metrics and standard deviations. You must convert both measures to a common scale which is z-scores. Z-scores can be seen as standard deviation units and represents the number of standard deviations that a score falls above the mean. Mr. smith scored 0. 6 standard deviations above the mean on scale number one. Mr. smith is 0. 375 standard deviations above the mean on scale number two. Still a normal distribution and behaves the same as a z-score, but has a different mean and standard deviation. You can also adjust the formula for other measures.