Page 158 - Data Science class 11
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Number of People (in hundreds)  15  Mode




                                                  10



                                                   5



                                                   0
                                                        Car   Train  Bus
                                                         Form of Transport

        From the above bar graph, it is clear that maximum number of people travelled via bus and that this value is 1300. Therefore,
        1300 is the mode here.


        4.3 SurveyS

        A survey is one of the research methods used for collecting data. In a survey, the subjects are usually people. The
        survey process involves asking various types of questions to a section of people (sample) for the desired information
        through a questionnaire. Surveys collect information from a targeted group of people or participants about their
        opinions,  behaviours,  suggestions,  experiences,  knowledge,  etc.  Most  of  the  surveys  are  conducted  for  scientific
        reasons, especially for the healthcare industry.
        We might now think that surveys are the same as questionnaires since these two terms are used interchangeably.  But
        a questionnaire is any written set of questions. On the other hand a survey is both the set of questions and the process
        of gathering, aggregating, and analysing the responses to the questions asked.


        4.3.1 Steps of conducting a survey
        The following are the steps to conduct any survey:
        1.  Determine your objectives

        2.  Select respondents
        3.  Create a data analysis plan
        4.  Develop the survey

        5.  Pre-test the survey
        6.  Distribute and conduct the survey
        7.  Analyse the data

        8.  Report the results

        4.3.2 types of Survey Methods
        Now that we have already learnt what a survey is, let's see what the different types of survey methods are.

        Online Surveys
        The advanced survey software solutions available today have made surveys easier to develop. The respondents can
        simply access these surveys if they have an Internet connection. These surveys are easy to design and deploy. They
        consist of survey questions that can be easily deployed to the respondents online via email. Respondents are given
        sufficient time and space to answer these surveys. They are economical, and data can be collected and analysed
        speedily.


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