The main objection to using anonymous questionnaires is that they

The main objection to using anonymous questionnaires is that they
 
  a. may have lower score validity.
  b. make follow-ups difficult.
  c. may elicit responses that are not as thoughtful or complete.
  d. make statistical analysis of data more difficult.

Ques. 2

Explain how two scientists who examine the same data may come to quite different conclusions.
 
  What will be an ideal response?

Ques. 3

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.

Ques. 4

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

Ques. 5

In a survey of n = 100 teachers, 50 preferred year-around school. Set the .95 confidence interval around this sample proportion.
 
  a. .40 to .60 c. .50 to .60
  b. .45 to .55 d. .55 to .65

Ques. 6

Explain why it is important for researchers to focus on only a few aspects of a problem at one time rather than to examine several aspects of a problem within the framework of a single study.
 
  What will be an ideal response?

Ques. 7

A university surveyed 36 randomly selected graduate students in a pilot study and found that 27 said they favored the new university health insurance plan and 9 said they opposed it. How many students must the university survey in order to make an estimate of how all graduate students feel about the plan with a margin of error to be no more than 5 percentage points? Use the 95 percent confidence level.
 
  a. 187 c. 366
  b. 288 d. 950

Ques. 8

Explain why the use of grade retention is an example of how unsystematic observations may lead to false conclusions.
 
  What will be an ideal response?

Ques. 9

A sample of 500 voters was surveyed; 400 said they favored a bond issue and 100 said they opposed it. Based on these sample data, estimate at the 95 percent confidence level the proportion in the population that likely favors the bond issue.
 
  a. .77 to .83 c. .79 to .81
  b. .78 to .82 d. .75 to .85

Ques. 10

Explain how unsystematic observations may lead to false conclusions.
 
  What will be an ideal response?

Ques. 11

Which technique would you recommend to a researcher who is interested in obtaining a good sample of a large population?
 
  a. Questionnaire c. Either one - they are equally effective
  b. Interview d. Observation

Ques. 12

Summarize the relationship between professional teacher education programs and competence as a teacher.
 
  What will be an ideal response?

Ques. 13

The main advantage of the questionnaire over the interview is that the questionnaire
 
  a. gives respondents more time to think about their answers.
  b. results in a higher response rate.
  c. is less expensive in terms of time and money.
  d. All of these are true.