The .95 confidence interval for a population proportion based on ...

[laurencescou]

The .95 confidence interval for a population proportion based on a sample of n cases ranged from .40 to .56 . If the sample proportion was unchanged, but the sample size was increased to 4n, the .95 confidence interval would be about
 
  a. .32 to .64 c. .44 to .52.
  b. .36 to .60 d. .46 to .50.

Question 2

Explain how the complexity of classroom teaching and learning affects research and efforts to apply that research.
 
  What will be an ideal response?

[al]

Answer to Question 1

C

Answer to Question 2

As David Berliner has argued, schools and classrooms differ from each other in a number of ways, including quality and quantity of personnel, teaching methods, budget, leadership, and community support. In addition, cognitive and effective outcomes of schooling are affected by complex interactions among such factors as student characteristics, teacher characteristics, curriculum materials, socioeconomic status of the community, and peer influences. The result of all this complexity is that teaching methods and programs that work the same way for a broad sample of teachers and students in different school districts are few and far between.