Answer:
how the secondary data were collected.
Explanation:
Secondary data refers to the data that is collected by other persons beside the researcher who actually use it. (in this context, it would be the data that is collected by other person than Marvin).
Sometimes, the collection method could influence the data given by the samples and will shaken up the overall conclusions.
I'll give you an example.
In market research, companies often conducts research to find out consumers' preference toward a certain product. This preference could be given by the people through either public survey and private survey. Most people tend to give a more truthful answer if the data is collected through private survey since answering in public survey makes the people fear a chance that they will be judged by others.
Answer:
The answer is construct validity.
Explanation:
Construct validity is described as the degree in which a study<em> actually</em> measures what it claims to be measuring. A well-designed research will ideally have high construct validy, while a poorly designed one may confound the variables and result in measuring a different aspect.
For example, if a researcher tries to find which of two perfumes is more attractive to customers, <u>but uses different shaped or coloured bottles</u>, it's possible that the test will lack construct validity (the bottles may affect the customers' opinions).
Africa and Asia are two continents or regions have the most countries expected to be facing water scarcity by 2024
Answer: Option D
<u>Explanation:</u>
When there is no enough water for the people of a certain region here rises the water scarcity. People in Asia almost dug deep for the groundwater resources and Africa facing scarcity of having clean water.
Huge children have become prey for the water scarcity. Meanwhile, in Asia, most of the countries started facing water scarcity on a big level. Dried wells, ponds, lakes, and rivers are the main cause.
Drought will be the biggest result of water-scarce which can turn the countries economy upside down. Also, climatic change is another cause in Africa that is vulnerable to side effects. Global warming will be the main reason for water scarcity.
Answer:
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
Explanation:
The Earth is approximately 
old. The solar system formed from giant gas clouds which was a part of the solar nebula.
The surface of soil which demarcates two soils of different geological ages is called a unconformity.
Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.
Hence, option C is true.
