Data Analysis

DA lecture FSS 2016 Uni Mannheim

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Kartei Details

Karten	16
Sprache	English
Kategorie	Politik
Stufe	Universität
Erstellt / Aktualisiert	31.05.2016 / 31.10.2018
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population

Tastatur-Befehle:

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the full set of cases about which we want to generalize

parameter

Tastatur-Befehle:

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a characteristic of the population, usually unknown

sample

Tastatur-Befehle:

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a subset of the population

statistic

Tastatur-Befehle:

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a characteristic of the sample, usually known

descriptive statistics

Tastatur-Befehle:

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numbers that summarise the distribution of values of a variable across a sample

inferential statistics

Tastatur-Befehle:

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the use of statistics to make inferences about a larger population based on data collected from a sample

frequencies

Tastatur-Befehle:

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the listing of possible values of a variable, together with the number of observations for these values

mode

Tastatur-Befehle:

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most frequent value

-> can be more than one, need not be near centre, can't be an outlier by definition

median

Tastatur-Befehle:

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middle point in an ordered set of values

-> not applicable to nominal variables (since they can't be ranked)

mean

Tastatur-Befehle:

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average value: sum of the observations divided by the number of observations

wheel of science

1. research question

2. theory

3. hypothesis

4. operationalisation

5. data collection

6. data analysis

range

distance between the largest and smalles values

measures of central tendency

- mode

- median

- mean

central tendency in normal distribution?

mean, mode and median are identical

measures of spread

tell us whether the variation around our average value is meaningful or unrepresentative

- range/interquartile range

- deviation/standard deviation

- variance

interquartile range

range of middle 50% of observations

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