Consider the following designs: (1)Nonrandomized pretest-posttest design; (2) Solomon three-group design; (3) two-group static design; (4) one-group pretest-posttest design; (5) counterbalanced design. Which of these would you recommend for use in the ordinary classroom setting?
a. 1 and 3
b. 1 and 5
c. 2 and 3
d. 3 and 4
e. 4 and 5
B
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a. 50 b. 20 c. 83 d. 78
Scientific research on child development and parenting began to regularly appear in journals during the __________.
A. 1920s B. 1930s C. 1940s D. 1950s
What is the common means of communication for students who are deaf-blind?
a. Cochlear implants b. Finger spelling c. Sign language d. Tactile signing
What are the null and research hypotheses, both symbolically and in plain English?
Belinda Buttons of the Peerless Zipper Company is in charge of quality control for the production of their 12-inch zippers. Recently, she has become worried about a disturbing drop in the quality of the zippers produced by her division. The zippers should be normally distributed with ? = 12 and ? = .10. She randomly samples 100 zippers and finds their mean length to be 12.06 inches. Do Belinda's zippers differ significantly from the population of zippers?