Graphical representation of data

Question 1

What is a histogram

Answer 1

data is grouped into
continuous number ranges and each range corresponds to a vertical bar.
*The horizontal axis displays the number range.
*The vertical axis (frequency) represents the amount of data that is present in each
range.

Question 2

What is a line chart?

Answer 2

used to show information that
changes over time. A line graph can be plotted using several points connected by
straight lines.

Question 3

Advantages of graphical representation of data

Answer 3

• It improves the way of analyzing and learning as the graphical representation makes the
  data easy to understand.
• It can be used in almost all fields from mathematics to physics to psychology and so on.
• It is easy to understand for its visual impacts.
• It shows the whole and huge data in an instance.

Question 4

Disadvantages of graphical representation of data

Answer 4

plotting data needs effort and identification of the type of plot
warrants skill.

Question 5

What is graphical representation of data?

Answer 5

visual representation of data statistics-based
results using graphs, plots, and charts.

Question 6

What rules must be followed when representing data graphically?

Answer 6

• Suitable Title
• Measurement unit
• Proper scale
• Index
• Data sources
• Simple
• Neat

Question 7

What are propaganda graphs?

Answer 7

that are
intended to show what already can be learned using data-analysis and inferential
testing,

Question 8

What are analytical graphs?

Answer 8

that allow to understand data over and above what
inferential statistic has already shown, and

Question 9

What are substitute for tables graphs?

Answer 9

graphs from which numbers are to be read off.

Question 10

Bar chart

Answer 10

A group of data represented with rectangular bars with lengths proportional to the
values is a bar graph. The bars can either be vertically or horizontally plotted.

Question 11

Bar chart with error bar

Answer 11

A common convention is to show the position of one standard deviation (s.d.) or
standard error of mean (s.e.m.) above and below the mean using a ‘whisker’.

Question 12

Grouped bar chart

Answer 12

The grouped bar graph, also referred
to as the clustered/ combined bar
graph, is used to show the discrete
value for two or more categorical data.

Question 13

Features of a histogram

Answer 13

• Columns are equal width per equal category interval
• Column areas are proportional to the frequency they represent
• The entire area of the histogram is considered as one unit
• Columns can only represent frequencies or percentage of total frequency
• There is no space between columns
• All categories are represented even if empty

Question 14

Stem leaf plot

Answer 14

A stem and leaf plot also called a stem and leaf diagram is a way of organizing data
into a form that makes it easy to observe the frequency of different types of values.
It is a graph that shows numerical data arranged in order. Each data value is
broken into a stem and a leaf.

Question 15

Box and whisker plot

Answer 15

• Uses median as its centre
• Hinges represent 25th and 75th percentiles
• Usually median is between the box
• If data i positively skewed, median shifts to the right, if negatively skewed, median shifts to the left

Question 16

Pie chart

Answer 16

The pie chart is a type of graph in which a circle is divided
into sectors where each sector represents a proportion of
the whole. We know that the total value of the pie is always
100%. It is also known that a circle subtends an angle of
360°.

Question 17

Two main formulas to calculate pie chart

Answer 17

• To calculate the percentage of the given data, we use the
  formula: (Frequency ÷ Total Frequency) × 100
• To convert the data into degrees we use the formula:
  (Given Data ÷ Total value of Data) × 360°