L4: ONE SAMPLE AND INDEPENDENT T-TEST

Question 1

When do we conduct a one-sample t-test?

Answer 1

When we have data from one group
When we want to compare the sample mean to a known or hypothesized value
No comparison is made between different groups

Question 2

What are the assumptions of a one-sample t-test?

Answer 2

Test variable is continuous
Data points are independent
Data is approximately normally distributed
No significant outliers

Question 3

How do w calculate a one sample t-test?

Answer 3

Mean - hypothetical mean
Divide
Standard error

Question 4

What are the assumptions of an independent samples t-test?

Answer 4

1. Groups are independent (each participant in only one group)
2. Dependent variable is continuous and approximately normally distributed
3. No significant outliers
4. Equal variances between groups (checked with Levene’s Test)