Praxis Core Academic Skills for Educators: Mathematics (5733)Statistics and ProbabilityEasy
A weather station recorded the daily high temperatures (in °F) for a week: 68, 72, 70, 75, 69, 72, 71. What is the range of these temperatures?
- A7
- B8
- C5
- D4
Show answer & explanationAnswer & explanation
Correct answer: A. 7
The range is the difference between the highest and lowest values in a data set. The highest temperature is 75°F and the lowest is 68°F. The range is 75 - 68 = 7.
Why the other options are wrong
- B. Incorrect, perhaps a miscalculation.
- C. Incorrect, perhaps a miscalculation.
- D. Incorrect, perhaps a miscalculation.
Range (Statistics)
The range of a data set is the difference between the maximum and minimum values.
- It is a measure of statistical dispersion.
- Easy to calculate but sensitive to outliers.
- Provides a quick sense of the spread of data.
Memory trick: Range is the edge-to-edge span.