Researchers in child development are interested in developing ways to increase the spatial- temporal reasoning of preschool children. Spatial- temporal reasoning relates to the child's ability to visualize spatial patterns and mentally manipulate them over a time- ordered sequence of spatial transformations. This ability, often referred to as thinking in pictures, is important for generating and conceptualizing solutions to multistep problems and is crucial in early child development. The researchers want to design a study to evaluate which of several methods proposed to accelerate the growth in spatial- temporal reasoning yields the greatest increase in a child's development in this area. There are three methods proposed: taking piano lessons for 3 months, playing specially developed computer video games for 3 months, and playing specially designed games in small groups supervised by a trained instructor. The researchers measure the effective-ness of the three programs by assessing the children and assigning each one a reasoning score both before and after participation in the program. The difference in these two scores is the response variable. A control group is also included to measure the change in reasoning for children not given any special instruction. A pilot study with only 20 students was to be conducted prior to the complete study to determine potential problems. Demonstrate how to assign 5 of the 20 students to each of the four instructionalonditions- no instruction (control), piano lessons, computer video games, and instructor- so that the assignment is completely random.
Answer to relevant QuestionsRefer to Exercise 14.8. Use residual plots to determine whether any of the conditions required for the validity of the F tests have been violated. In exercise Refer to the study described in Exercise 14.11. a. Use Tukey’s W procedure to identify significant differences in the mean sensory ratings of the three levels of percentage of milk fat. b. Use Tukey’s W procedure to ...Refer to Exercise 14.20. a. Test for an interaction between the effects of Mn and Cu on soybean yield. Use α = .05. b. What level of Mn appears to produce the highest yield? c. What level of Cu appears to produce the ...A physician was interested in examining the relationship between the work performed by individuals in an exercise tolerance test and the excess weight (as determined by standard weight– height tables) they carried. To do ...Refer to Exercise 14.36. a. Are the computational formulas for obtaining the sum of squares appropriate for the data in the tomato experiment? Justify your answer. b. Verify that there are no major violations in the ...
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