A researcher records a sample of 30 exam scores and finds that the population variance for these data is larger than the sample variance. Is this possible?
A. Yes, the population variance is usually larger than the sample variance.
B. No, the population variance will only be larger when at least 50 scores are recorded.
C. No, the sample variance will be larger because SS is divided by degrees of freedom in the denominator of the variance formula.
D. Not possible to know because the scores are not given.
Ans: C
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According to Erikson, as children enter middle childhood they are dealing with the stage of ______.
a. trust versus mistrust b. industry versus inferiority c. initiative versus guilt d. identity versus role confusion
Which of the following options best describes high-achieving classrooms?
A. high socioeconomic status (SES) B. high English language proficiency C. significantly more independent reading D. significantly more focus on content areas
An example of a tangible support is?
a. ?sharing toys. b. ?giving advice. c. ?companionship. d. ?empathy.
Which of the following is NOT a key principle of effective discipline according to the text?
a. achieve compliance b. keep the emotional tone positive c. use the least amount of power sufficient to achieve compliance d. use corporal punishment if all else fails