Answer:
Unsystematic Variability
Explanation:
Variability
This refers to a number or measure of the observed differences in the value of a variable that is from one unit of observation to another unit.
Unsystematic variability
This is usually refered to as a type of variability that is unexplainable (not accounted for) for by a one or a known source, but that comes from effects or the combinations of extraneouss variables, measurement error, and noise.
They are the known differences in scores of individuals because of the variable that were not examined. They are usually not related to variables examined. Mostly type 11 error, are within groups variance in experiments and usually leads to high total variability.
Answer: The answer is hindsight bias
Explanation:
Hindsight bias : This can be defined as a situation whereby a person forecast the consequence of an event that could happened in the future which eventually happened exactly the way the person had forecasted the event . When an event had occurred, people tend to have the habit of saying that,they knew the consequences of the event happening before it eventually happened. This concept is applicable in the areas of sport for example when someone forecast that his football team is going to beat their opponent by two goals to one and it eventually happened the way the person had predicted it. It can also be applicable in the areas of politics, for example when someone had forecasted that the candidate for their party in the forthcoming election will win the election by a wide margin to beat the other contestant in the election, and it happened exactly the person had predicted it. Therefore, in the event described in the question, the research is known as hindsight bias.
Because they needed help to fight back
Booming system of trade , stable government, climate suitable for trade .