Type 1 and Type 2 Errors

The video tutorial explains the difference between Type 1 and Type 2 errors using the story of 'The Boy Who Cried Wolf'. It describes how villagers make both errors: a Type 1 error when they falsely believe there is a wolf, and a Type 2 error when they fail to act despite a real threat. The tutorial also covers hypotheses testing and how to calculate error rates using G Power.

What is the main focus of the video tutorial?

• Understanding statistical errors

• Learning a new language

• Exploring historical events

• Studying animal behavior

Which story is used to explain Type 1 and Type 2 errors?

• The Fox and the Grapes

• The Ant and the Grasshopper

• The Boy Who Cried Wolf

• The Tortoise and the Hare

What is the null hypothesis of the villagers in the story?

• The boy is truthful

• There is a wolf

• There is no wolf

• The boy is lying

What is the alternative hypothesis of the villagers in the story?

• The boy is lying

• There is no wolf

• The boy is truthful

• There is a wolf

What should researchers do after collecting data?

• Discard it

• Publish it immediately

• Test their hypothesis

• Ignore it

What decision do the villagers make when they hear the boy's false alarm?

• They call the police

• They rush to help

• They laugh at him

• They ignore him

What type of error occurs when the villagers respond to the boy's false alarm?

• Type 1 error

• Type 2 error

• Type 4 error

• Type 3 error

What is a Type 1 error also known as?

• False positive

• True negative

• False negative

• True positive

What happens when the boy cries for help when there is actually a wolf?

• The villagers laugh at him

• The villagers help him

• The villagers ignore him

• The villagers call the police

What type of error occurs when the villagers ignore the boy's true alarm?

• Type 4 error

• Type 1 error

• Type 2 error

• Type 3 error