Answer:
C.
Explanation:
In 1837, when Samuel Morse had an idea of making electric telegraph worked, he faced with a challenge to push forward the signal across long distance. They knew that sending legible signal across the continent would be difficult. So, Morse attached a relay to his device that will work like a relay horse, sending forward the signal by taking message from the exhausted partner and push it with renewed vigor.
So, the correct answer is option C.
Answer:
The independent variables are the level of tiredness and the number of hours slept by the volunteers.
Explanation:
Independent variables are those that act on the dependent variables influencing a result, which can be observed by the researcher. In summary, the independent variable is one that can influence. In the case of the question above, we can see that the number of hours slept by the volunteers influenced the level of tiredness of the volunteers. These two variables were able to influence the level of proactivity and performance of the volunteers in their activities, which allows us to determine that these two variables are the independent variables of the study.
Answer: NON-EQUIVALENT GROUP DESIGN.
Explanation: A nonequivalent group design is a quasi‐experiment used to assess the relative effects of treatments that have been assigned to groups of participants non-randomly (adults whose name appeared in the local police report as child abuse victims, and those have never been victims). Because the participants have been assigned to treatments non-randomly by Dr. Rose, differences in the composition of the treatment groups can bias the estimates of the treatment effects. A variety of statistical methods are available for taking account of this selection bias. Each method imposes different assumptions about the nature of the selection effects, but it can be difficult to determine which set of assumptions is most appropriate in a given research setting.
i belive the answer to be slavery