Timescaledb time-weighted average

1. How do you calculate time-weighted average?
2. What is weighted average in time series?
3. How do you calculate 8 hour TWA?
4. Why do we use time-weighted average?

How do you calculate time-weighted average?

A time-weighted average is equal to the sum of the portion of each time period (as a decimal, such as 0.25 hour) multiplied by the levels of the substance or agent during the time period divided by the hours in the workday (usually 8 hours).

What is weighted average in time series?

Time-weighted averages are a way to get an unbiased average when you are working with irregularly sampled data. Time-series data comes at you fast, sometimes generating millions of data points per second (read more about time-series data).

How do you calculate 8 hour TWA?

(c) The eight-hour time-weighted average sound level (TWA), in decibels, may be computed from the dose, in percent, by means of the formula: TWA = 16.61 log₁₀ (D/100) + 90. For an eight-hour workshift with the noise level constant over the entire shift, the TWA is equal to the measured sound level.

Why do we use time-weighted average?

Time-weighted average calculations are used in situations where the time of exposure to a hazardous substance or the concentration of that substance varies. It is also applicable to short-term samples, such as a 15-minute TWA. The caluclation can also consider particular variables, dose rates, and duration.