Is a z test or a one-sample t test appropriate and why?
A psychologist wants to know if the average length of courtship is different before a second marriage than before a first. Based on previous research, it is known that for courtship before first marriages, ? = 200 days. The psychologist collects a sample of 150 people who have just been married for a second time and finds in her sample a mean of 225 days and standard deviation of 25 days.
Ans: We do not have information about the population standard deviation, so we use the one-sample t test.
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The family-centered model focuses on
a. the etiology of the disability. b. the parents delivering the intervention. c. the strengths in the child and family. d. the parental supportive system.
It is important for teachers of young children be very good participants in children’s dramatic play
a. True b. False
Which of the following statements about the role of textbooks in curriculum is most accurate?
a. The curriculum plan, not the textbook, tends to most determine the knowledge base for individual courses. b. Textbooks tend to help address the curriculum to the special needs of particular groups of students. c. Textbooks influence the nature and sequence of a curriculum. d. Textbooks tend not to affect students' learning experiences.
An early childhood educator has been given a set of colorful, attractive posters that she would like to display. However, she is concerned by the lack of gender balance depicted. Which of the following would be an appropriate solution to this dilemma?
A. Discard the poster. B. Ask parents of the children to decide whether or not they mind having the posters displayed in the classroom. C. Show children the posters as they are, then talk with children about the imbalance and how they might address it. D. Make sure there are mixed gender books nearby where the poster is displayed.