The answers for the blanks in the sentence description are double; single.
Explanation: Double blind procedures are used in research situations where there is concern that knowledge of the hypothesis or treatment conditions might skew the results in some way. Therefore it is best that the person receiving the treatment being studied or answering the questions on a survey for example does not know the aims of the study per se, and in the double blind situation the person directly responsible for administering the questions or gathering data is also not aware so they cannot introduce any bias. In a single blind situation the aims of the study in terms of hypothesis for example are not know to the participant themselves, but the researcher directly gathering the data and interacting with the research subjects will know the hypothesis or reasons for treatment in the study.
Stupid. Why would the europeans want to spread disease? Our knowledge of disease and it's transmission was not good enough for colonists to even understand that they were spreading disease. Certainly they did, but it wasn't their goal or main reason.
Explanation: Breaches can occur when one party fails to perform their duties on time, fails to perform in the manner detailed in the contract, or does not fulfill their obligations at all.
The experimental design is called Between Subjects Design or Independet Measure.
Explanation:
In the experimental design "Independet Measures" you have different groups. Each group is tested under certain conditions whereas a member of one group cannot be part of another group. A commonly known case were this experimental design is used is drug testing. One group is given the medication whereas the other group receives the placebo.
