CompTIA Data+ (DA0-002)Data Concepts and EnvironmentsEasy
A data analyst is working with a dataset that includes customer feedback ratings on a scale of 1 to 5, where 1 is 'Very Dissatisfied' and 5 is 'Very Satisfied'. The analyst wants to understand the distribution of satisfaction levels but knows that the difference between a 1 and a 2 is not necessarily the same as the difference between a 4 and a 5 in terms of actual customer sentiment. Which of the following data types BEST describes these ratings?
- AOrdinal
- BRatio
- CNominal
- DInterval
Show answer & explanationAnswer & explanation
Correct answer: A. Ordinal
Ordinal data has a meaningful order, but the intervals between values are not necessarily equal. Customer satisfaction ratings on a scale of 1-5 fit this description because there's an order (5 > 4), but the difference in sentiment between 1 and 2 might not be the same as between 4 and 5.
Why the other options are wrong
- B. Ratio data has a meaningful order, equal intervals, and a true zero point.
- C. Nominal data has categories without any inherent order.
- D. Interval data has a meaningful order and equal intervals, but no true zero point.
Ordinal Data
A type of categorical data where the categories have a natural, meaningful order or ranking, but the differences between categories are not necessarily equal or measurable.
- Categories have a clear order.
- Differences between values are not quantifiable or consistent.
- Examples include satisfaction ratings, educational levels (e.g., high school, bachelor's, master's).
Memory trick: NOIR: Nominal is Name, Ordinal is Order, Interval is Intervals, Ratio is Real Zero.