Psychology 1000 Lecture Notes - Lecture 4: Percentile Rank, Percentile

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Laura Fazakas- De Hoog

Document Summary

Psychol 1000 - lecture 4 - methodology/data analysis/statistics ii. A sample that reflects the characteristics of the larger population from which it was drawn is referred to as a __________ sample. Inferential statistics: tests the hypothesis to make conclusions. Need to test our hypothesis using statistics. 10 participants randomly divided into 2 groups. Record the number of catches for each subject (out of 5) The two average values are clearly different, but need to ask . How big are those differences compared to the variability in the data? (use the t test or analysis of variance to determine this) Assume there are no differences between groups. The groups won"t all have the exact same numbers. We use statistics to determine what size of a difference is likely by chance. If the differences between our groups is larger than what we had expect by chance, we reject the idea that our conditions are all the same (i. e. reject null hypothesis)