1. Statistical Inference
PSYSTA1 – Week 9

2. Statistical Decision Making Process
Sampling
Probability
induced by sampling

3. Inferential Statistics
Main Procedures
Inferential Statistics
Estimation
Point Estimation
Interval Estimation
Hypothesis Testing

4. Estimation
Consider:
Suppose a university administrator is interested in the average IQ of professors at her university.
Key Concepts:
point estimate
standard error
interval estimate
confidence level

5. Hypothesis Testing Consider:
Suppose a scientist is interested in determining whether or not marijuana intake significantly increases appetite.
Key Concepts:
null and alternative hypotheses
significance level
decision rule; critical region
test statistic
p-value
*effect size