DA0-002 Data Concepts and Environments Practice Question
A sensor records temperature readings in Celsius and a separate sensor records wind speed in meters per second. A data scientist wants to combine these datasets for analysis. Which statement accurately compares these data types?
⚠ Common exam trap
A common mix-up: candidates confuse interval and ratio data by overlooking the significance of a true zero point, leading candidates to incorrectly classify temperature as ratio data.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Temperature is interval; wind speed is ratio
Temperature measured in Celsius has an arbitrary zero point (0°C does not mean 'no heat'), so it is interval data. Wind speed in meters per second has a true zero point (0 m/s means no wind), making it ratio data. Therefore, option D correctly identifies temperature as interval and wind speed as ratio.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Both are ratio data
Why it's wrong here
Temperature in Celsius is interval, not ratio, because 0°C does not represent absence of temperature.
- ✗
Temperature is discrete; wind speed is continuous
Why it's wrong here
Temperature is continuous; it can take any value within a range.
- ✗
Both are discrete data
Why it's wrong here
Temperature and wind speed are both continuous, not discrete.
- ✓
Temperature is interval; wind speed is ratio
Why this is correct
Celsius has no true zero (interval), while wind speed has a true zero (ratio).
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