Summary
Contents
The author focuses especially on weaknesses in numeracy often observed in adults, and in teacher-trainees in particular.
Check-up 8: Bar Charts for Continuous Data
Check-up 8: Bar Charts for Continuous Data
The pupil-teacher ratio (PTR) for a school is calculated by dividing the number of pupils by the number of teachers. The bar chart shows the distribution of PTRs across all the primary schools in one LEA. To process the data the PTRs have been rounded to one decimal place.
- What is the PTR for a school with 345 pupils and 17 teachers?
- Approximately, for what percentage of schools is the PTR in the range 20.0–24.9?
- Approximately, for what percentage of schools is the PTR 25 or greater?
Answers to Check-up 8
- 20.294117647… (using a calculator), which rounds to 20.3.
- About 41%.
- About 33%.
Discussion and Explanation of Check-up 8
For (a), on my ...