A Nation at Risk emphasized that the well-being of the nation was being eroded by
a. the high cost of education.
b. increasing federal involvement in education.
c. interference by community leaders in reforming the curriculum.
d. mediocrity in education.
ANSWER: d
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What type of picturebooks are characterized by ambiguous endings, referencing other texts, and playing with readers?
a. Fantastical b. Postmodern c. Modern d. New Age
A student's performance on an intelligence test is affected by ____
a. The student's race and ethnicity b. The student's sensory acuity and language status c. The student's age and acculturation d. All of the above
. Three key elements of control that allow researchers to draw cause-and-effect conclusions are
A. randomization, manipulation, and variation. B. assignment, manipulation, and comparison/control. C. randomization, manipulation, and comparison/control. D. randomization, condition, and comparison/control.
Calculate the variance.
A marketing researcher for a toothpaste company wants to know how often on average people brush their teeth per day. He obtains a sample of 25 adults. Their responses to his question are summarized in the following simple frequency distribution: X f 10 1 9 0 8 0 7 3 6 3 5 0 4 4 3 3 2 8 1 2 0 1