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Prices of steel and aluminium prices will depend on the market demand and supply.
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Explanation:
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The manufacturing industries are mainly depending on the steel as major source of raw material. The main reason for the demand of the steel will increase if the infrastructure development in the society. And it also reflects the economic boom happening in the society.
So if the demand of the steel increases because of various reasons like wage rise and demand for raw material like iron ore. In the event of price rise of steel the aluminium will be the next alternate for steel in the infrastructure development. So, if there is demand for steel arises automatically the aluminium prices will also increase.
Answer:
C) Stratified sampling
Explanation:
Stratified sampling: This is one of the probability sampling technique in which the researcher tends to divides a particular population that is taken for the researcher purpose into various groups or strata, and after dividing the population, the researcher randomly finally selects the participants from those groups or strata and being analyzed later on. Further, the group is taken for study is through the random sampling technique.
Advantage:
1. It provides great precision.
2. The study group is small, hence cost-effective.