Which of the following best captures what is meant by the term “variability” as it pertains to statistics?
a. The median math test score was an 80.
b. The average math test score was an 82. Some students did worse than that, but many students did better than the average; one person even got a 100.
c. The mode of all of the math test scores was a 92.
d. Math test scores were positively related to the amount of time students studied for the test. Those who studied for longer amounts of time tended to score higher on the test.
Ans: B
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a. always aggressive, such as physical acts of aggression or bullying. b. always nonaggressive, such as delinquency, truancy, and theft. c. both physically aggressive and nonaggressive. d. None of these choices are correct.
A(n) ______ is an instrument of data collection where researchers ask questions directly to participants and record their answers.
A. interview B. observation C. questionnaire D. test
Reasonableness with numbers means that students can:
a. consider whether a number makes sense in its context. b. compute answers rapidly. c. use algorithms correctly. d. explain their answers.
A family may exist on a long or short-term basis
Indicate whether the statement is true or false.