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Lecture 2

# PSYB07H3 Lecture Notes - Lecture 2: Statistical Inference, Barbecue, Descriptive Statistics

Department
Psychology
Course Code
PSYB07H3
Professor
Dwayne Pare
Lecture
2

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PSYB07 â€“ LECTURE 02
BASIC CONCEPTS
Math Review
- Order of operations (BEDMAS) [left to right]
ïƒ˜Brackets
ïƒ˜Exponents
ïƒ˜Division
ïƒ˜Multiplication
ïƒ˜Subtraction
Population vs. Sample
- Population
ïƒ˜Entire collection of event in which youâ€™re interested
- Sample
ïƒ˜Subset of population
- Example: population= PSYB07 class, sample= PSYB07 tutorials
- CASE: Iâ€™m in a car with 3 of my friends, and weâ€™re trying to decide
where to go for dinner.
- Korean barbeque? A poll is conducted between Tim, Jess, Sijing,
Dwayne
- Population=Tim, Jess, Sijing, Dwayne Sample= Tim, Jess, Sijing,
Dwayne
- Population: all the people in the bus, Sample: Tim, Jess, Sijing, Dwayne
Descriptive vs. Inferential Statistics
- Descriptive Statistics (describe a data set
ïƒ˜Can be calculated for a population or a sample
ïƒ˜Calculating statistics or parameters
ïƒ˜Describe the population becomes smaller
- Inferential Statistics (make conclusions about population from samples)
ïƒ˜Estimating population parameters using sample statistics