# Sustainability reporting internships: what the data work involves

## An annual figure with one missing month

A fictional facility has eleven complete monthly electricity records totaling 110,000 kWh. December is missing. For this exercise only, the reviewer permits an estimate using the mean of the eleven observed months.

### Keep observations and estimates separate

| Record | Status |
| --- | --- |
| January–November: 110,000 kWh | Observed total |
| December | Missing source record |
| Permitted estimate | Mean of the eleven observed months |

## Your turn

What estimated annual total follows, and how should it be labeled?

## Your answer

[Write your approach here.]

## For your own application

Replace the estimate when the actual record arrives and retain the revision history.

Return to the guide for the worked answer and source notes:
https://internshipdeadlines.com/guides/sustainability-reporting-internships