# Statistik at TU München

## Flashcards and summaries for Statistik at the TU München

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## Study with flashcards and summaries for the course Statistik at the TU München

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What is a retrospective study?

### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What is a discrete numerical variable?

### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What is a continuous numerical variable?

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### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What is an categorical variable?

### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What is a nominal variable?

### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What is a ordinal variable?

### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What characterizes an observational study?

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### Exemplary flashcards for Statistik at the TU München on StudySmarter:

What characterizes an experiment?

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What is an anecdotal evidence?

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What is a confounding variable?

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What is a prospective study?

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What is stratified sampling?

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## Exemplary flashcards for Statistik at the TU München on StudySmarter:

Statistik

What is a retrospective study?

a observational study that collects information after the events took place

Statistik

What is a discrete numerical variable?

numerical variable that can only take numerical values with jumps

Statistik

What is a continuous numerical variable?

a numerical variable that can take any numerical value

Statistik

What is an categorical variable?

a variable that can take categories

Statistik

What is a nominal variable?

a categorical variable without natural ordering

Statistik

What is a ordinal variable?

A categorical variable with natural ordering

Statistik

What characterizes an observational study?

• collecting data in a way that does not directly interfere with how the data arise
• can provide evidence of naturally occurring association between variables
• does not show a casual connection

Statistik

What characterizes an experiment?

• checks for casual connection between variables
• controlls circumstances

Statistik

What is an anecdotal evidence?

• a single case (may be representative or not) to reject or justify a statement

Statistik

What is a confounding variable?

a variable that is correlated with explanatory and response variable but not observed in the observational study

Statistik

What is a prospective study?

study that observes while events unfold

Statistik

What is stratified sampling?

• divide population into strata
• similar cases belong to the same stratum
• use second sampling method within each stratum
• useful when cases in each stratum are similar
• analyzing data is more complex

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