Page 283 - Data Science class 11
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7.  Which one of these refers to a line through a scatter plot data that best expresses the relationship between those
                  points?
                  a.  Trend line                                     b.  Line of best fit

                  c.  Diagonal line                                  d.  Line of points

               8.  The plot where in we can observe the 1st quartile and 3rd quartile is:
                  a.  Horizontal bar chart                           b.  Stacked bar chart
                  c.  Line chart                                     d.  Box plot

               9.  The package that used along with ggplot to create maps is:
                  a.  ggmaps                                         b.  geomaps

                  c.  geommap                                        d.  ggmap
               10.  Which of these is a measure of central tendency that gives the value of the middle-most observation in the data?
                  a.  Mean                                           b.  Median

                  c.  Mode                                           d.  Confidence Interval

            B.  Fill in the blanks.

               1.  The ______________________ parameter is used to drop observations from left side and right side of a data set.
               2.  A ______________________ line is a straight line that best represents the points on a scatterplot.

               3.  The ______________________ function in R is used to create the line graph.
               4.  A ______________________ chart is a circular statistical graphic that is divided into slices.

               5.  The ______________________ parameter is used to specify the label for the x axis in a line chart.

            C.  State whether these statements are true or false.
               1.  We cannot draw more than one line in a line chart.                                      ____________

               2.  Maps are commonly used to visualise certain factors that have been influenced geographically.   ____________

               3.  Mean and Median are the only two statistical methods which are referred as “Measures of
                  Central Tendency”.                                                                       ____________
               4.  Mode() is used to calculate the highest number of occurrences in a set of data.         ____________
               5.  The column parameter is used to add colours to the bars.                                ____________


                 Standard Questions (Section B)


            A.  Short answer type questions:
               1.  What is the purpose of Stacked Bar Graphs?

               2.  What are the main advantages of using a histogram?
               3.  A trend line is a straight line that best represents the points on a scatterplot. Elaborate on this sentence.

               4.  With the help of a sketch, show how the box plot represents the minimum, maximum, median, first quartile, and third
                  quartile in the data set.






                                                           Coding for Data Science Visualisation using R-Studio  281
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