Page 148 - Data Science class 11
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But in situations where we have huge amount of data but limited understanding of the elements that influence the
              entity, then the forecasting may not be done properly and its accuracy may not be accurate. Also, in many situations of
              natural disasters like a forest fire cannot be forecasted accurately.


                                              Unsolved Exercise


             Objective Type Questions (Section A)


        A.  Tick ( ) the correct option.
            1.  Machines can             .
              a.  analyse historical data
              b.  detect patterns

              c.  predict the probability of certain events occurring in the future
              d.  All of these

            2.  Which of the following is true about forecasting?
              a.   Forecasting relies on the gathered data—usually collected from both the past and the present
              b.  the analysis of the market trends

              c.  the development of the description of the actions to follow
              d.  All of these
            3.  Which of following is not a subject of forecasting?

              a.  Choosing a date to start a scheme of business
              b.  Gaining valuable insight
              c.  Learning from past mistakes.

              d.  Decreasing the life cycle costs
            4.  Which of the following is a false statement?
              a.  Forecasts are never 100% accurate

              b.  Forecasting may be time-consuming and resource-intensive
              c.  Forecasting is a codal requirement

              d.  Forecasting method can also be costly
            5.  Which of the following is not true?
               An observational study can be defined as:
              a.  a procedure in which the subjects are just observed, and the results are then noted.

              b.  an act of competition
              c.  during the investigation, nobody tries to interfere with the subject to affect the outcome.

              d.  All of these
            6.  Please choose the correct option: In forecasting, past and present data are used to predict the future as accurately as
              possible.
              a.  The above statement is always true.            b.  The above statement is never true.
              c.  The above statement is sometimes true.         d.  None of these.

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