stats 10 multiple choices

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1. The great strength of experimental research is that _________________.

A. you can identify variables that vary together

B. you can identify and describe causal relationships

C. you can ignore extraneous variables

D. they are simple to execute

2. Higher scores on the Scholastic Aptitude Test are related to higher grades in college. This is an example of a __________________.

A. causal relationship

B. positive correlation

C. negative correlation

D. lack of correlation

3. Correlations are effective for ________________________.

A. identifying causal relations

B. identifying confounds

C. reducing bias

D. understanding how variables change together

4. The presence of a(n) ____________interferes with establishing a clear causal connection between your independent and dependent variables

A. extraneous variable

B. confounding variable

C. independent variable

D. dependent variable

5. A scientist is evaluating two teaching methods, Method A and Method B. Students in class A are taught the course content using Method A. This class is taught by Dr. Smith. Students in class B are taught the same course content by Dr. Johnson using teaching Method B. The effectiveness of the two teaching methods is evaluated through one multiple choice exam which is taken by all students. In this example the independent variable is ________________.

A. the two teaching methods, method A and method B

B. the students

C. the two teachers, Dr. Smith and Dr. Johnson

D. the multiple choice exam

6. A scientist is evaluating two teaching methods, Method A and Method B. Students in class A are taught the course content using Method A. This class is taught by Dr. Smith. Students in class B are taught the same course content by Dr. Johnson using teaching Method B. The effectiveness of the two teaching methods is evaluated through one multiple choice exam which is taken by all students. In this example the most obvious confound is ________________.

A. the two teaching methods, method A and method B
B. the students
C. the two teachers, Dr. Smith and Dr. Johnson
D. the multiple choice exam

7. A scientist is evaluating two teaching methods, Method A and Method B. Students in class A are taught the course content using Method A. This class is taught by Dr. Smith. Students in class B are taught the same course content by Dr. Johnson using teaching Method B. The effectiveness of the two teaching methods is evaluated through one multiple choice exam which is taken by all students. In this example the dependent variable is ________________.

A. the two teaching methods, method A and method B
B. the students
C. the two teachers, Dr. Smith and Dr. Johnson
D. the multiple choice exam

8. A product warranty card might ask you to check your occupation. The selections include: health care, financial services, manufacturing, legal services & education. In this example occupation is measured on a ____________ scale.

A. nominal

B. ordinal

C. interval

D. ratio

9. A researcher records the weights of children by comparing their weight to the average for their age. Specifically, a score is obtained by taking the child’s weight and subtracting the average. Given an average weight of 105, original weights of 95, 110 and 100 become -10, +5 and -5. In this example weight’s are now measured on a ___________ scale.

A. nominal
B. ordinal
C. interval
D. ratio

10. Proportion (p) =

A. f / p

B. f / n

C. n / p

D. n / f