- Distinguish between random and stratified sampling?
- Which is wider, a 95% or a 99% confidence interval?
- When you construct a 95% confidence interval, what are you 95% confident about?
- What assumptions are made in the construction of a confidence interval on the mean?
- For what does p > 0.05 stand?
- What is the formal definition of the 'mean'?
- When computing a confidence interval, when do you use t and when do you use z?
- What is the effect of sample size on the width of a confidence interval?
- Assume a researcher found that correlation between a test he or she developed and job performance was 0.5 in a study of 25 employees. If correlations under 0.30 are considered unacceptable, would you have any reservations about using this test to screen job applicants?
- What assumptions are made in the construction of a confidence interval on µ?
- Define independent and dependent variables.
- Categorize the following variables as being qualitative or quantitative:

Fabric texture

Rating of job satisfaction

Favorite color

Occupation aspired to

Number of words remembered - An experiment is conducted to examine the effect of punishment on learning speed in rats. What are the independent and dependent variables?

**Multiple Choice Questions:**

- This institution requires that all covered research projects be reviewed by the board before the research takes place.

a. IRB

b. FDA

c. USDA

d. DHHS - This type of quantitative research involves looking at conditions that have already occurred and then collects data to investigate the possible relationships between these conditions.

a. Descriptive

b. Experimental

c. Causal-comparative

d. Correlational - This is an in-depth study of a single program (e.g., an activity, event, process, or individuals) based on extensive data collection.

a. Ethnographic

b. Correlational

c. Phenomenology

d. Case Study - The process of assigning individuals at random to groups or to different groups in an experiment.

a. Analytical

b. Observation

c. Random assignment

d. Content analysis - One-on-one interviews are

a. Time consuming

b. Costly

c. Should be with people not hesitant to speak

d. All of the above - This type of survey is used to collect data about current attitudes, opinions, or beliefs at one point in time.

a. Longitudinal

b. Cross -Sectional

c. Document Analysis

d. Time-point Analysis - A newspaper can be used as part of what type of research?

a. Cross-sectional survey

b. Artifact analysis

c. Document analysis

d. None of the above - Reliability can be measured by:

a. the degree at which measurement changes after repeated action

b. the differences within the measurements in a given time period

c. the extent that researchers explored alternative explanations for experimental conclusions.

d. The degree the measurement remains the same over time.