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3.   Which data collection method is used to engage in direct connection with individuals or organisations and can be
                          structured, semi-structured, or unstructured?
                          a.  Questionnaire                              b.  Marketing Campaign
                          c.  Interview                                  d.  Observation
                     4.   Testing the efficiency of different advertising techniques on a group of people is an example of which primary data
                          source?
                          a.  Observation                                b.  Experiment
                          c.  Marketing Campaign                         d.  Questionnaire

                     5.   What method employs automated software to gather specific information and data from websites?
                          a.  Social Media Data Tracking                 b.  Web Scraping
                          c.  Satellite Data Tracking                    d.  Online Data Platforms
                     6.   Kaggle, GitHub, KDNuggets, and Google Dataset Search are examples of what type of secondary data source?

                          a.  Books, textbooks, and encyclopedias        b.  Web Scraping
                          c.  Satellite Data Tracking                    d.  Online Data Platforms
                     7.   Which level of measurement is used when data is categorised without any order or ranking?
                          a.  Ordinal                                    b.  Interval
                          c.  Ratio                                      d.  Nominal

                     8.   Which measure of central tendency is most affected by extreme values (outliers)?
                          a.  Mean                                       b.  Median
                          c.  Mode                                       d.  All are equally affected
                     9.   When is it most appropriate to use the median as a measure of central tendency?

                          a.  When the dataset contains no outliers
                          b.  When the dataset contains outliers
                          c.  When the data is nominal
                          d.  When calculating the average of categorical data
                     10.   What is the output of statistics.stdev ([5, 10, 15, 20, 25])?
                          a.  The average of the data                    b.  The middle value of the data
                          c.  The most frequent value in the data        d.  The standard deviation of the data

                     11.   In a dataset with no repeating values, what can be said about the mode?
                          a.  There is one mode                          b.  There are multiple modes
                          c.  There is no mode                           d.  There is a mode, but it cannot be calculated

                     12.   What is the purpose of data visualisation?
                          a.  To make data analysis more complicated      b.  To simplify the interpretation of complex data
                          c.  To hide information from the user          d.  To increase the size of datasets
                     13.   Which function is used to set the size of the plot in Matplotlib?
                          a.  title()                                    b.  xlabel()
                          c.  figure()                                   d.  show()

                     14.   What does each sector (slice) in a pie chart represent?
                          a.  Frequency or count                         b.  Mean value
                          c.  Individual data point                      d.  Percentage of the whole


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