Lena evaluates wind turbine output across 4 sites. The daily generation (in kWh) is: Site 1: 12.4, Site 2: 15.6, Site 3: 9.8, Site 4: 17.2. What is the median daily output, and what percentage of the total output does Site 2 contribute? - Groen Casting

Understanding the Context

Step 1: Calculate Total Daily Output

To understand overall performance, we begin by summing the output from all four sites:
Total output = 12.4 + 15.6 + 9.8 + 17.2 = 54.0 kWh

Step 2: Determine the Median Daily Output

With four data points (an even number), the median is the average of the two middle values after sorting. Sorting the outputs:
9.8, 12.4, 15.6, 17.2

The 2nd and 3rd values are 12.4 and 15.6. Their average gives:
Median = (12.4 + 15.6) / 2 = 28.0 / 2 = 14.0 kWh

Step 3: Compute Site 2’s Contribution Percentage

Site 2 generated 15.6 kWh out of a total of 54.0 kWh. To find its share:
Contribution percentage = (Site 2 output / Total output) × 100
= (15.6 / 54.0) × 100 ≈ 28.89%

Key Insights

Conclusion

Lena’s evaluation reveals that while Site 2 leads in daily generation, the average output across all four sites stands at 14.0 kWh, providing a benchmark for performance. Site 2 contributes approximately 28.89% of the total daily wind energy output, highlighting its significant role in the network. Continuous monitoring like this supports better maintenance, forecasting, and optimization of wind farms.

Tracking daily generation across sites empowers operators to maximize energy yield and ensure reliable renewable power delivery.