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Thinking about Data:

Thinking about Data:. Terms: matrix unit of analysis case variable code. Types of Data.

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Thinking about Data:

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  1. Thinking about Data: • Terms: • matrix • unit of analysis • case • variable • code

  2. Types of Data • Microlevel: data collected on the characteristics of individual cases, people, houses, events, that is, discrete units. For example an individual, with characteristic information on sex, age, state of residence, etc. • Aggregate: Tabular data representing counts of units falling into particular categories, e.g., populations of states. The state is the unit of analysis; the variables are the name of the state and the population of the state.

  3. Sources of Data • Survey: collected specifically for the research purpose, e.g., CPS, GSS, census. • Administrative record: records of immigrant arrivals by port; tax filings; vital registration records; case files of judicial proceedings, health records.

  4. Univariate Statistics • Types of Variables: Nominal; ordinal, interval, ratio • Measures of central tendency: mean, median, mode • Measures of dispersion: standard deviation, ntiles, range, coefficient of variation • Measures of shape: skewness, kurtosis.

  5. YRBUILT N of cases 1235 Minimum 888.000 Maximum 929.000 Range 41.000 Sum 1116660.000 Median 904.000 Mean 904.178 95% CI Upper 904.724 95% CI Lower 903.633 Std. Error 0.278 Standard Dev 9.770 Variance 95.451 C.V. 0.011 Skewness(G1) 0.409 SE Skewness 0.070 Kurtosis(G2) -0.528 SE Kurtosis 0.139 CONCOST 1127 20.000 5200.000 5180.000 354277.000 250.000 314.354 332.888 295.820 9.446 317.116 100562.250 1.009 5.563 0.073 59.859 0.146 STATS YRBUILT CONCOST / Mean Min Max SD CV Kurtosis Median Range SEK SEM SES Skewness Sum Variance N CIM=.95

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