Psychology 2080A/B Chapter 2: 2080B Chapter 2.docx

• School: Western University
• Department: Psychology
• Course: Psychology 2080A/B
• Professor: Prof

Document Summary

Chapter 2: norms and basic statistics for testing. Inference: logical deductions about events that cannot be observed directly. Descriptive statistics: are methods used to provide a concise description of a collection of quantitative information. Inferential statistics: are methods used to make inferences from observations of a small group of people known as a sample to a larger group of individuals known as the population. Magnitude: a scale has a property of magnitude if we can say that a particular instance of the attribute represents more, less, or equal amount of the given quantity than does another instance. Absolute 0: is obtained when nothing of the property being measured exists (example you have 0 dollars in your bank account) Frequency distributions: displays scores on a variable or a measure to reflect how frequently each value was obtained. If the tail of the distribution goes off toward the higher end, it is called a positive skew and vice versa.