The research error described above is an example of selection bias.
Selection bias takes place when, from a population of interest, a group of individuals is selected in order to construct a sample but without a proper randomization. The result is a sample which is not representative of the underlying population.
According to the example, the target population of the research comprises all students but the sample only includes boys. Hence, selection has not been random because it followed a gender criteria, and the results obtained using it cannot be applicable to the whole population because they are affected by a selection bias.
The properties of the liquids from what they have described here would be that :
- The yellow property is the physical property
- The corrosive nature is the chemical property.
<h3>What is a physical property?</h3>
This is the term that is used to refer to a measurable change. It is one that is not manifested through a chemical type of change.
<h3>What is a chemical property?</h3>
This is any substances that is known to change during the action of any chemical reaction.
Read more on physical properties here:
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Complete question
A yellow liquid is found to be corrosive. How are the properties of the liquid best described? (select all that apply)
Select all that apply:
The corrosive nature of the liquid is a physical property.
The yellow color of the liquid is a physical property.
The corrosive nature of the liquid is a chemical property.
The density of the liquid is a chemical property.
Answer mine first then i will answer yours ok
The North was mainly industrial.The South was mainly agrarian. There were some mutual needs between the two (for example the South produced cotton and the North manufactured clothing, so the North needed what the South had to make clothes, and the South needed to buy the clothes that the North made), but the lifestyles were so different that the two regions had little in common besides that
hope this helps
