SAEE Data Collection and Analysis 3 — Questions and Answers
Question 1: What is the range of the data set 12, 15, 7, 22, 9?
- 7
- 13 (Correct answer)
- 15
- 22
Correct answer: 13
Range equals the maximum minus the minimum, 22 - 9 = 13.
Question 2: Which type of data is 'eye color' an example of?
- Continuous
- Ordinal
- Nominal (Correct answer)
- Interval
Correct answer: Nominal
Eye color is nominal because categories have no inherent order.
Question 3: A survey question that suggests a desired answer is called a:
- Closed question
- Leading question (Correct answer)
- Open-ended question
- Filter question
Correct answer: Leading question
A leading question biases respondents toward a particular answer.
Question 4: If a data set's mean is much larger than its median, the distribution is likely:
- Symmetric
- Right-skewed (Correct answer)
- Left-skewed
- Uniform
Correct answer: Right-skewed
A right-skewed distribution has a long upper tail pulling the mean up.
Question 5: Which of these is a measure of dispersion?
- Mean
- Mode
- Standard deviation (Correct answer)
- Median
Correct answer: Standard deviation
Standard deviation measures how spread out values are around the mean.
Question 6: Secondary data refers to data that is:
- Collected firsthand
- Obtained from existing sources (Correct answer)
- Always less accurate than primary
- Only qualitative
Correct answer: Obtained from existing sources
Secondary data comes from sources collected by someone else previously.
Question 7: A scatter plot is primarily used to show:
- Parts of a whole
- Relationship between two variables (Correct answer)
- A single category total
- Change in one variable over time only
Correct answer: Relationship between two variables
Scatter plots reveal the relationship or correlation between two variables.
SAEE Data Collection and Analysis 3
What is the range of the data set 12, 15, 7, 22, 9?