Hypothesis, P-Value, Errors Flashcards

1
Q

What is the P-Value?

A

Probability that the hypothesis is right

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2
Q

What is the alpha-level?

A

The threshold for the P-Value
Pre-determined prior the analysis

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3
Q

What is a null hypothesis?

A

Hypothesis against the research question
It claims there is no difference in result

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4
Q

What is an alternative hypothesis?

A

Claims there is a difference in result
Opposite to the null hypothesis

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5
Q

When statistically testing the hypothesis, what do you measure the probability for?

A

Null hypothesis
You can never prove something is true but can only prove something is false

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6
Q

How is significancy estimated?

A

Probability the difference occurred by chance
(P-Value)

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7
Q

What are the 2 types of errors in statistical tests?

A

Type 1= False positive
Type 2= False-negative

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8
Q

What is a type 1 error?

A

False-positive
Reject the null hypothesis when it is true

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9
Q

What is a type 2 error?

A

False-negative
Not rejecting the null hypothesis when it is false

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10
Q

What sign is >?

A

Greater than

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11
Q

What sign is <?

A

Less than

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