Recent research on substance abuse has suggested that
A) drug prevention programs have been effective in reducing substance abuse among adolescents.
B) there has been a recent increase in adolescent substance abuse.
C) adolescent substance is no longer a significant problem in our country.
D) boys tend to use more over-the-counter medications than do girls.
B
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Representing a product of two factors may depend on the methods student experienced. What representation of 37 x 5 below would indicate that the student had worked with base-ten?
a. An array with 5 x 30 and 5 x 7. b. 5 groups of 30 lines and 5 groups of 7 dots. c. 5 circles with 37 items in each. d. 37 + 37 + 37 + 37 + 37 + 37 + 37.
You would use a ______ to illustrate data for the variable “Number of cars per driver.”
a. bar chart b. histogram c. frequency polygon d. pie chart
Ex post facto research is characterized by
a) Random selection of subjects b) Random assignment of subjects to different groups c) No active manipulation of the independent variable d) Multiple regression analysis
Cronbach’s alpha is used to measure which type of reliability?
A. ecological reliability B. test–retest reliability C. internal consistency D. interrater reliability