Page 303 - Data Science class 11
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vi.  Which of these would make an observational study unethical?
                     a.  Putting an observer in danger

                     b.  Making use of multiple observers
                     c.  Failure to obtain consent from those being observed
                     d.  Carrying out the observation last at night

            Q. 3.  Answer any 5 out of the given 6 questions                                         (1 × 5 = 5 marks)

                 i.   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.  An experiment in which the samples are given some values to see the change.

                 ii.     Which of the following is a method of data collection by sensing?

                     a.  Use of speed guns to measure the speed of vehicles by traffic police.
                     b.  Performing surveys to calculate the population of the country

                     c.  Performing experiments and observing the results
                     d.  None of these

                 iii.  Which of the following statement is false?
                     a.  Yes/No is an example of close ended question in a survey.

                     b.  A rating scale of 1-10 is an example of close ended question in a survey.
                     c.  A multiple-choice option is an example of close ended question in a survey.

                     d.  Suggesting improvement is an example of close ended question in a survey.

                 iv.  The R programming language was developed by:
                     a.  Robert Ihaka and Ross Gentleman             b.  Robert Gentleman and Ross Ihaka

                     c.  Robert Ross and Ross Gentleman              d.  Robert John and Ross Ihaka
                 v.   The meaning of setwd() function is:

                     a.  Sets the working directory
                     b.  Sets the working environment

                     c.  Sets the working file
                     d.  Sets the working graph

                 vi.  From the list of values given , choose the correct data type:  “cat”   30L   8+4i   , 456

                     a.  String, complex, Boolean, integer
                     b.  Integer, numeric, Boolean, complex
                     c.  String, complex, integer, numeric

                     d.  String, integer, complex, numeric





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