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
The Upper Cave at Zhoukoudian yields ages of about 25,000 years for Homo sapiens.
School age (late childhood): 6–12 years, or to puberty.
How to calculate the mean for grouped data
Data for Calculating Productivity Growth in Erewhon
Carbon Dioxide Concentrations for 400,000 years
Jia's Fashions recently paid a $2 annual dividend. The company is projecting that its ...