# Psychology 1000 Lecture Notes - Lecture 6: Descriptive Statistics, Standard Deviation, Central TendencyPremium

by OC1895631

School

Western UniversityDepartment

PsychologyCourse Code

PSYCH 1000Professor

Laura Lyn Fazakas DehoogLecture

6This

**preview**shows half of the first page. to view the full**3 pages of the document.**Psychology 1000 – Lecture 6

Professor Fazakas-Dehoog Section: Psychology 1000 002

Statistical Methods in Psychology

- Processing the numbers

- Tells us that the results are not due to chance

- Descriptive statistics:

o Describe what happened in your study

- Inferential Statistics:

o Tells us that the results are not due to chance

Descriptive Statistics

- Measures of central tendency:

o Mean

▪ Add all up and divide by number of participants

o Median

▪ Middle score (highest to lowest) and find the middle one

▪ If you have two middle scores take the average of the two middle

scores (i.e. 8+11/2 = 19/2 = 9.5)

o Mode

▪ Most common score

▪ If there are two top scores – it is bi-modal – you would list both as

the modes.

- Measures of variability

o Range – what range did the numbers span? Biggest number minus the

smallest number

o Standard deviation

The Same Mean, But Different Variability

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