* Transformation: Added variance and standard deviation for sample and population. Modified mean calculation approach
* Transformation: Removed existing mean calculation
* Transformation: Added testcases for variance and Standard deviation
* Update docs/sources/panels/calculation-types.md
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
