Economics is the study of how individuals, institutions, and society make choices under the conditions of scarcity is.
Because slavery was a horrible thing in US history and it is important that it doesn't happen again <span />
This was called Manifest Destiny.
During the 19th century, America thought it was its destiny to spread all over the continent, take everything away from Native Americans and spread its democratic views to everyone else because it was 'the right thing to do.'
Question options:
reactivity
selection bias
external validity
the reliability of the measurement
Answer:
the reliability of the measurement
Explanation:
Good Observations are more reliable and valid. Professor Ibrahim's refinement to define rating scales and be sure observers(seeing how they disagree on their observations and how this could affect research) are following this ensures judgement based on data collected from these individuals(observers) are more reliable, which will ensure construct validity.
