Class Notes (1,100,000)

CA (650,000)

UTSC (30,000)

Psychology (9,000)

PSYB07H3 (50)

Dwayne Pare (30)

Lecture 1

Department

PsychologyCourse Code

PSYB07H3Professor

Dwayne PareLecture

1This

**preview**shows half of the first page. to view the full**2 pages of the document.**Definitions

Datum: Singular form of data

Population: entire collection of events in which you are interested. You study population

PARAMETERS and use GREEK LETTERS for variables.

Sample: subset of said population. If you survey the entire population, then population=sample.

You study sample STATISTICS and use ROMAN/NORMAL LETTERS for variables.

Descriptive Stats: describe a data set numerically. Can be a parameter if based on population

or a statistic if based on a sample

Inferential Stats: make conclusions about populations from samples

External Validity: The degree to which the sample reflects the population. This is affected by:

Sample size (higher sample size is better)

Random sampling (positive)

Internal Validity: The degree to which the experiment measures what it’s supposed to

Discrete variable: Something that can take a limited number of values (Y/N)

Continuous variable: Something that can theoretically take any value along a scale (%)

This is a bar graph - used when data is discrete

This is a histogram - used for continuous data

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