A ______ distribution is one in which two values clearly distinct from each other have the greatest frequency.
a. unimodal
b. bimodal
c. trimodal
d. multimodal
b. bimodal
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In a study of the influence of yogurt consumption and immunity (Van de Water, Keen, & Gershwin, Journal of Nutrition, 1999) there were three study groups per age group (young adults and senior adults). Live-culture yogurt, pasteurized yogurt and control (no yogurt) were given to each age group in portion sizes of 200 grams per day for 1 year. What would be considered a useful set of planned contrasts?
A. contrast 1 = (control group) + (those having live-culture yogurt)contrast 2 = (those having live-culture yogurt) + (those having pasteurized yogurt) B. contrast 1 = (control group) + (those having pasteurized yogurt)contrast 2 = (those having live-culture yogurt) + (those having pasteurized yogurt) C. contrast 1 = (control group) + (those having live-culture yogurt + those having pasteurized yogurt)contrast 2 = (the group having live-culture yogurt) + (the group having pasteurized yogurt) D. None of the above
What evidenced-based teaching practice encourages students to "think about their thinking?"
a. Metacognition b. Scaffolding c. Explicit teaching d. Strategic teaching
Which is an example of a subtle act of bias?
a. physical assault b. verbal abuse c. telling rumors d. harassment
Eighth graders in a control group were resentful of the treatment offered to their classmates in the intervention group. This is an example of which type of threat to internal validity?
a) Diffusion of intervention b) Instrumentation c) Statistical regression d) History