Answer:
Quota sampling
Explanation:
Quota Sampling is a non-probability sampling method in which the population is divided in <u>mutually exclusive subgroups</u> and the items from each of the subgroups are <u>selected based on a proportion. </u>
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In this example the households were divided into <u>two subgroups: single-person households and husband-wife households </u>(it is clear that this subgroups are mutually exclusive). Then, since 40% of all households are single-person and 60% are husband-wife, t<u>he researcher ask interviewers to collect information based on this proportion,</u> therefore, 40% of the interviews will be done with single-person households and 60% with husband-wife households. Thus, these interviews are done based on a proportion.
We can see that the example meets all the requirements for quota sampling and thus, it's an example of this type of sampling.
Answer:
Spring.
Explanation:
Russia is in the northern hemisphere.
Answer:Some individuals may be natural good at maths or may be just smart kids who are good with mathematics
Explanation:Some students may be intelligent or good at maths which means the shoe size will not be the cause of their quantification skills.
A confounding variable refers to another variable that you may have not take notice of but which is very likely to act on the variable you are trying to measure and make that change you are looking for , its an extra variable. It can mess up your experiment and give you result that are not caused by what your projected. They can assume a correlation that doesn't exist and insert bias in your study. For this reason you have to know these variable before you start your research or study in order to avoid them.
The answer is C. Stock Exchanges
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