Unit 1: Exploring One-Variable Data
Statistics · Unit 1 · Paper 3

Exploring One-Variable Data 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 1Paper 2Paper 3
Each paper is built from this unit’s 21 terms and is the same for everyone, so a teacher can assign “Unit 1, 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 32 min 29 points0/17 attempted
1

Mean vs median resistance

2

Skewness direction

3

Standardizing and comparing

4

Categorical vs quantitative variables

5

Choosing a graph type

6

Normal probability calculations

7

Percentile

8

Normal distribution and the empirical rule

9

Why context is scored

10

Cumulative relative frequency graph

11

Comparing distributions

12

Describing a distribution

Short answer 1. Define or explain: 1.5 × IQR outlier rule

3 pts

Short answer 2. Define or explain: Interquartile range

3 pts

Short answer 3. Define or explain: Boxplot limitations

3 pts

Short answer 4. Define or explain: Effect of transformations

3 pts

Free response

5 pts

This course has no free-response prompt tagged to this unit, so one from elsewhere in the course is used. It is still worth writing — the skill transfers.

Eight students' study hours (x) and exam scores (y) give ŷ = 52 + 6.5x, with r = 0.87 and s = 4.2.

Interpret the slope in context.

Interpret r² in context.

A student who studied 5 hours scored 88 — find and interpret the residual.

Explain what s = 4.2 measures.