In a study of environmental physics, the maximum telemetry transmission range (in km) of high-altitude weather balloons launched from two different zones in the stratosphere—the Polar Zone and the Tropical Zone—was compared. In each zone, 25 balloons were monitored, yielding the following raw data:
| Stratosphere Zone | Telemetry Transmission Range (km) |
|---|---|
| Polar Zone | 32, 45, 38, 51, 34, 47, 40, 53, 36, 49, 42, 55, 31, 44, 37, 50, 33, 46, 39, 52, 35, 48, 41, 54, 43 |
| Tropical Zone | 41, 30, 52, 35, 46, 32, 55, 38, 43, 34, 50, 37, 48, 33, 54, 40, 31, 56, 36, 45, 42, 53, 39, 51, 44 |
The mean telemetry transmission range for all 50 balloons combined was 42.4 km.
What percentage of the Polar Zone balloons transmitted above the combined mean range and what percentage of the Tropical Zone balloons transmitted above the combined mean range? Show your calculations.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.