The degrees of freedom ______ indicates ______.
a. dfBG; the size of the sample
b. dfWG; the number of groups being compared
c. dfBG; within-group variability
d. dfWG; the size of the sample
d. dfWG; the size of the sample
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The correlation between a predictor and a criterion is .84. This means that the criterion has about ____ percent of its variance in common with the predictor
a. 16 c. 70 b. 42 d. 84
Match the research questions below with the most appropriate research approach for answering the question
a. Experimental g. Phenomenology b. Causal-comparative h. Case study c. Correlational i. Basic interpretive d. Quantitative descriptive j. Content analysis e. Ethnography k. Historical f. Grounded theory 1. Do students learn new spelling words more effectively with a tactile method or with a workbook method? 2. How does an urban middle school faculty adapt to a rapid shift in the ethnic composition of the student body? 3. How do school board members interpret the experience of a making decisions about a major budget cut? 4. How are new faculty members acculturated to the school environment in an elementary school? 5. What are the origins of the doctor of education degree? 6. How is the self-esteem of obese high school students compared to that of non-obese high school students? 7. What are the interrelationships of members of a street gang. 8. What is the relationship between vocational choices of community college students and their parents' educational levels. 9. What view of mainstreaming emerges based on studies in several elementary schools? 10. What percentage of high school seniors use drugs and how frequently do they use them? 11. What are the differences in textbooks designed to teach technical writing compared to those designed to teach creative writing?
A researcher studies the relationship between early reading and later school achievement. She decides that a potentially important extraneous variable is IQ. In developing her groups for her study, she pairs each child who was an early reader with a child of the same IQ level who was not an early reader. The control technique she used was:
a. Holding the extraneous variable constant b. Statistical control c. Matching d. Random assignment
Identify the problem that represents the join, result unknown structure
A) Maryann had 3 library books before she checked out 2 more. How many did she have all together?
B) Maryann had 5 library books before she returned 2 of them. How many does she have now?
C) Maryann had 4 nonfiction books and 2 fiction. How many more nonfiction books does she have?
D) Maryann had 9 library books and Jim had 4. How many more did Maryann have than Jim?