13) Cross-sectional studies are the types of descriptive research studies that measure a population at only one point in time. A)True B)False 14) Continuous panels are the type of panel that varies...

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Extracted text: 13) Cross-sectional studies are the types of descriptive research studies that measure a population at only one point in time. A)True B)False 14) Continuous panels are the type of panel that varies questions from one panel measurement to the next. A)True B)False 15) Extraneous variable exerts influence on the dependent variable but is NOT an independent variable. A)True B)False 16) Laboratory experiments are particularly useful for achieving internal validity. A)True B)False