Research · Unit 2 · Paper 3

Data Collection & Analysis unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1 Paper 2 Paper 3

Each paper is built from this unit’s 33 terms and is the same for everyone, so a teacher can assign “Unit 2, Paper 3” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.

Suggested time 33 min 30 points0/17 attempted

Inter-rater reliability

Chi-square test

Multiple comparisons problem

Outliers: what to do

Type I and Type II errors

Effect size

Systematic sampling

t-test

p-value, stated correctly

Response rate and nonresponse bias

Regression

Interview types

Short answer 1. Define or explain: Social desirability bias

3 pts

Short answer 2. Define or explain: Snowball sampling

3 pts

Short answer 3. Define or explain: Standard deviation and range

3 pts

Short answer 4. Define or explain: Transcription and coding

3 pts

Free response

6 pts

A student proposes the following data collection and analysis plan. "I will hand out a paper survey to students during lunch on one Friday, asking them to rate their stress on a scale of 1 to 10 and to report how many hours of homework they do. I expect about 120 responses. I will then calculate the correlation between the two numbers. If the correlation is above 0.5, I will conclude that homework causes stress."

Identify TWO threats to the validity of the sample and explain each.

Explain one measurement problem with the stress variable as operationalized.

Explain why the proposed conclusion does not follow from the proposed analysis.

Describe ONE specific change that would strengthen the study without requiring resources a student does not have.