One-sample z tests are seldom used because _____
a. the population mean and standard deviation are seldom both known
b. the sample mean and standard deviation are seldom both known
c. the calculations are too complex
d. no conclusions can be drawn from the results of the test
A
Populations are usually so large that we never know their standard deviations.
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Baby Tyrese has an understanding of "things he can reach," such as a toy in his crib, and "things he can't reach," such as the mobile hanging above his crib. According to Piaget, what are these cognitive structures called?
a. Theories b. Schemes c. Assimilation categories d. Accommodation categories
What is the best example of overregularization?
a. Saying "horse" instead of "hose" b. Saying "houses" instead of "homes" c. Saying "flunked" instead of "failed" d. Saying "runned" instead of "ran"
Gerry is an undergraduate at the local community college. He has just taken the Undergraduate Stress Questionnaire and received a high score. This suggests that Gerry
a. has a high rate of satisfaction with life, in general. b. is socially more active than the average college student. c. has been exposed to health-threatening levels of stress. d. has a Type A personality.
Expensive early learning centers that feature a full curriculum of reading, math, science, art, music, and
gym A) tend to produce the most academically advanced schoolchildren. B) can compensate for extreme deprivation in the early months of life. C) usually create a stress-free environment for infants and parents. D) can overwhelm children, cause them to withdraw, and threaten their interest in learning.