Answer:
There were two main shortcomings with the Literary Digest's 1936 presidential poll:
- Sample bias: the magazine selected 10 million people out of three sources: telephone directories, club memberships, and magazine-suscriber lists. These sources gave the sample and middle an upper middle cass bias because in the epoch, few poor people owned telephones, were members of private clubs, or were suscribers of magazines.
- Nonresponse bias: Literary Digest wanted to survey 10 million people, but out of the 10 million people who received the poll, only 2.5 million people responded. This is called a nonresponse bias because the people who respond surveys have specific qualities different from the people who do not respond surveys.
Modern-pollsters tries to be more careful when selecting a sample: it should be representative of the population as a whole. Pollsters also have to deal with nonresponse bias, therefore, they try to send their surveys to people who are more likely to respond.
Answer:
1. A vassal is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe
The lord took care of his vassal and provided for him.
2. In their master's land.
Serfs were slaves for their masters.
Explanation:
I am not sure about the last one, also sorry that this question was not answered sooner. I hope this helps.
Bleeding Kansas was a series of conflicts (with over 50 deaths and around 100 wounded) between the supporters of slavery and the opponents of slavery in 1854-1861, that is, before the Civil War.
It was important because it showed how difficult a compromise would be between the pro- and anti-slavery sides and it was a first step in a conflict that later turned into the Civil war.
Answer: steps of a crime scene investigation:
secure the scene.
separate the witnesses.
scan the scene.
seeing the scene (taking photographs)
sketch the scene.
search for evidence.
secure the collected evidence.
Explanation:
separate the witnesses should follow "secure the scene" :)
