Types of graphs, types of error, types of hypotheses(cognitive)

What is a type 1 error

accepting alternative hypothesis when should’ve accepted null. No significant difference but you reported there was

What is a type 2 error

accepting null hypothesis when should’ve accepted alternative. Is a significant difference but you reported there wasn’t

What is the conventional level of significance used

up to 5% that results were caused by chance

What is a bar chart for

discrete (distinct categories) variables therefore separated columns. Displays means or percentage

What is a histogram for

continuous variables therefore columns that touch. Display means or percentage

Frequency graph

Display progress. Dot at correct height at various points than join dots

What is the difference between extraneous variables and confounding variables

Extraneous variables might affect the study, confounding variables already have

What is an alternative/experimental hypothesis

A statement predicting a significant difference between two conditions

What is a null hypothesis

A statement predicting there will be no significant difference between two conditions

What is another word for a directional hypothesis

one-tailed hypothesis