You are analyzing data that has been collected in annual waves for the past twenty years. Which of the following might be problematic in this type of analysis?
a. many similar questions were asked during each of these waves, and the wording is consistent
b. for the entire twenty years, the data was collected by personal interviews
c. the definitions of some key items have changed over time within the culture
d. using variables that are operationalized consistently over time
Question 2
Being able to benefit from the work of topflight professionals and esteemed academics is an advantage of using:
a. secondary data
b. published statistics
c. nonpublic agency data
d. new data collected by agency staff
Energy budget for a temperate deciduous forest (data from Gosz et al. 1978).
The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger
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During drought years on the Galapagos, small, easily eaten seeds become rare, le
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The Titanic carried only twenty lifeboats, a reason why so many perished in 1912. The Lusitania (abo