Data Analysis & Reporting Flashcards
7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Data Analysis & Reporting flashcards as text
When normalizing energy consumption data for weather variations, which metric is most commonly used?
Answer: Degree days (heating and cooling)
Degree days (heating and cooling) are the standard metric for weather-normalizing energy consumption, allowing meaningful comparisons across different climate periods.
A facility's energy intensity is best expressed as:
Answer: BTU per square foot per year
Energy intensity expressed as BTU per square foot per year normalizes consumption by building size, enabling meaningful benchmarking against similar facilities.
Which statistical technique is used to identify the relationship between energy consumption and production output in a manufacturing facility?
Answer: Linear regression analysis
Linear regression analysis quantifies the relationship between energy consumption (dependent variable) and production output (independent variable), producing an Energy Performance Indicator.
In an energy audit report, the Simple Payback Period (SPP) is calculated as:
Answer: Implementation cost divided by annual energy savings
SPP = Implementation Cost ÷ Annual Energy Savings, giving the number of years required to recover the initial investment through energy cost reductions.
What does a coefficient of variation (CV) in energy data analysis primarily indicate?
Answer: The relative variability or dispersion of data around the mean
The coefficient of variation (CV = standard deviation / mean) indicates the relative dispersion of data, helping analysts assess data reliability and identify anomalous readings.
Which chart type is most appropriate for displaying the distribution of a facility's energy end-uses by percentage?
Answer: Pie chart or stacked bar chart
Pie charts and stacked bar charts effectively display proportional breakdowns of energy end-uses, making it easy to identify the largest consumption categories.
When reporting energy savings from an Measurement & Verification (M&V) plan, the baseline period must:
Answer: Represent normal operating conditions before the efficiency measure
Per IPMVP protocols, the baseline must represent typical operating conditions prior to implementing the energy conservation measure, ensuring valid savings comparisons.