Respuesta :
Answer:
Detailed explanations are given below in the explanation section
Step-by-step explanation:
1) Cases:
100 penguins that were randomly assigned to two groups.
Variables:
Independent variables (Input variables):
i)Electronic tag
ii) metal strip tag for penguins.
Dependent variables (Output variables):
i) Survival rates
ii) number of chicks
iii) foraging trips
2) It is an experimental study
An observational study is a study where nothing changes and only the record of what is seen is documented, but an experimental study is where there are control and testable groups. In an observational study, the researcher has no control over the variable, but in this study, the researcher tagged the penguins with either a metal strip or an electronic tag, I.e. they have control over the input variables. This makes it an experimental study.
3)Yes, we can conclude that the metal tag is causing the problems
This conclusion is valid because:
i) The number of sample used I.e. 100 penguins is large enough
ii) The tags were randomly assigned to the penguins which eradicates any form of bias
iii) The experiment was carried out for a period of time i.e. 10 years sufficient to come by a reasonable conclusion.
Based on the information given regarding the sampling, the cases in the study is that 100 penguins were randomly assigned to two groups.
Sampling
The independent variables include the electronic tag, and metal strip tag for penguins. The dependent variables include the survival rates, number of chicks, and foraging trips.
From the information,it can be deduced that it's an experimental study as there are control and testable groups.
Since the scientists found a strong association between the type of tag and various measures, with the metal tagged penguins having less success, it can be concluded that the metal tag is causing the problems
Learn more about sampling on:
https://brainly.com/question/17831271
