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There are both advantages and disadvantages of data collection methods in statistics. The main advantages are the metrics and correlation one can draw from statistics. The disadvantages stem from sampling errors.
Since time-series forecasts are relatively easy and inexpensive to construct, they are used quite extensively.
There are clear advantages to the deductive method. These include that the person is more likely to learn and remember how they got to the answer in the future and also they remember the stages they have gone through. A major disadvantage is that it does take longer than other methods.
urmmm .. shows cause and effecthas high control which lead to high reliability & validity
no advantages no advantages