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Explanation & Answer
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(a) Describe the structure of the data set. In your answers include the population of
interest, sample size, number of variables, type of variables (i.e. categorical
(nominal/ordinal) or quantitative (discrete/continuous), type of data (i.e., crosssectional, time series, or longitudinal data). (10 points)
Population of interest is the annual salary in thousands of dollars (WAGP).
Sample size = 186,
Number of variables = 9,
Type of variables:
• SERIALNO
category = nominal; not quantitative; type of data = cross- sectional
• SPORDER
category = nominal; type of data = cross- sectional
• W AGP
quantitative = continuous; type of data = time series
• SCHL
category = ordinal; type of data = longitudinal survey
• AGEP
quantitative = discrete; type of data = time series
• SEX
category = nominal; type of data = cross- sectional
• HIC OV2
category = ordinal; type of data = longitudinal survey
• JW MNP
quantitative = continuous; type of data = time series
• MAR
category = ordinal; type of data = longitudinal survey
(b) If each year the Census Bureau interviewed the same sample of househ olds, wh at
would be the type of dataset generated by the ACS in this case? (3 pts). Explain.
The type of dataset generated in that case would be longitudinal survey data, as it is
defined as the data that follows the changes of one subject (the sample of households)
over periods o...