Statistics

Instructions: For this assignment, complete the concept questions and text exercise below.

Concept Questions

1. Distinguish quantitative from qualitative research methods?

2. What two elements are necessary for true experimental research and what is the advantage of conducting this type of research?

3. List and describe the following major threats to internal validity in a research design (maturation, history, and attrition) that make it difficult to determine a causal relationship between the dependent variable and the independent variable? Please provide examples as well as ways to control for these threats.

4. List and describe the following major threats to external validity in a research design (interaction between testing and treatment, reactivity, and experimenter expectancy) that make it difficult to generalize the results of this study to other people, settings, and conditions. Please provide ways to control for these threats.

5. What does it mean to say that there is confounding in experimental research?

6. Several sources of confounding can occur in research such as the Hawthorn Effect, the Placebo Effect, and Demand Characteristics. Define these sources of confounding and tell how they can be controlled for?

Concept Questions

1. Define and provide examples for when to best use simple random sampling, table of random numbers, stratified random sampling, and random cluster sampling?

2. What do we mean by an unbiased sample? Does using an unbiased sample mean that the sample will not contain sampling errors?

3. What factors determine an adequate sample size when comparing group differences?

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Posted on May 20, 2016Author TutorCategories Question, Questions