Praxis Core Academic Skills for Educators: Mathematics (5733)Statistics and ProbabilityEasy
A meteorologist is recording the daily high temperatures (in °F) for a week in a particular city: 72, 75, 68, 70, 73, 76, 69. What is the range of these temperatures?
- A6°F
- B5°F
- C8°F
- D7°F
Show answer & explanationAnswer & explanation
Correct answer: C. 8°F
To find the range, subtract the minimum value from the maximum value in the dataset. First, identify the minimum temperature (68°F) and the maximum temperature (76°F). Then, 76 - 68 = 8°F.
Why the other options are wrong
- A. Incorrect calculation; perhaps a misidentification of min/max.
- B. Incorrect calculation; perhaps a misidentification of min/max.
- D. Incorrect calculation; perhaps a misidentification of min/max.
Range (Statistics)
The difference between the highest and lowest values in a dataset.
- A simple measure of dispersion.
- Highly affected by outliers.
- Indicates the spread of the entire dataset.
Memory trick: Dispersion: spread out, how far from the mean.