disadvantages of diagrammatic representation of data

5.1.1 Advantages and Disadvantages of Representation of Data

In this topic we will learn how to:

select a suitable way of presenting raw data, and discuss the advantages and/or disadvantages that particular representations may have

We will learn how to represent data using a stem-and-leaf diagrams, box-and-whisker plots, histograms and cumulative frequency graphs. We will also learn to calculate measures of central tendency and variation. We’re going to explore the advantages and disadvantages of particular representations and statistical data. \textbf{\large\textcolor{gray}{Stem and Leaf Diagram}} \textbf{\textcolor{gray}{Advantages}}

It shows all of the original data
It shows the shape of the distribution i.e skew
The mode, median and quartiles can be found from the diagram
It is useful for comparing two sets of data

\textbf{\textcolor{gray}{Disadvantages}}

It is not suitable for large amounts of data

\textbf{\large\textcolor{gray}{Box and Whisker Plot}} \textbf{\textcolor{gray}{Advantages}}

It is easy to see whether the distribution is symmetrical or whether there is a tail to the left or right
It can be used to investigate extreme values (outliers)
It is easy to see the range and interquartile range
You can compare two or more sets of data by drawing on the same diagram
It does not show frequencies
It only shows particular values of the data

\textbf{\large\textcolor{gray}{Histogram}} \textbf{\textcolor{gray}{Advantages}}

It can represent groups of different widths
It shows whether the distribution is symmetrical or skew
The mean and standard deviation can be estimated from the histogram
The visual impact can be altered by using different scales

\textbf{\large\textcolor{gray}{Cumulative Frequency Graph}} \textbf{\textcolor{gray}{Advantages}}

The median and quartiles can be estimated from the graph
Sets of data can be compared by drawing graphs on the same diagram

\textbf{\Large\textcolor{gray}{Measures of Central Tendency}} \textbf{\large\textcolor{gray}{Mean}} \textbf{\textcolor{gray}{Advantages}}

It is calculated using all the data so it represents all the items
It is calculated using a mathematical formula so calculators can be programmed to find it
It is extremely useful for further analysis
It can be unduly affected by one or two extreme values

\textbf{\large\textcolor{gray}{Mode}} \textbf{\textcolor{gray}{Advantages}}

Useful when the most popular category is required, e.g clothes or shoe sizes
Not very useful for small data sets, or when there are more than two modes
There may not be a mode
It may not be representative, e.g. it could be the lowest value
Modal class depends on the grouping of the data
It is not useful for further analysis

\textbf{\large\textcolor{gray}{Median}} \textbf{\textcolor{gray}{Advantages}}

It is not affected by extreme values
It can be found as soon as a middle value is known
It does not use the whole data set

\textbf{\Large\textcolor{gray}{Variation}} \textbf{\large\textcolor{gray}{Range}} \textbf{\textcolor{gray}{Advantages}}

It is easy to calculate
It represents the complete spread of the data
It is affected by extreme values

\textbf{\large\textcolor{gray}{Interquartile Range}} \textbf{\textcolor{gray}{Advantages}}

It is not unduly influenced by extreme values
It can be used to investigate extreme values
It depends only on particular values when the data is ranked

\textbf{\large\textcolor{gray}{Standard Deviation}} \textbf{\textcolor{gray}{Advantages}}

It is calculated using all the data and so represents every item
It is very useful for further analysis
It is useful in comparing two sets of data, for example by showing which is more consistent
For a single set of data its value is difficult to interpret

Let’s look at some past paper questions. 1. Twenty children were asked to estimate the height of a particular tree. Their estimates, in metres, were as follows. (9709/53/M/J/22 number 2)

It is given that the mean is 6.17 and the median is 5.45 . Give a reason why the median is likely to be more suitable than the mean as a measure of the central tendency for this information. Since we have a value that appears anomalous (does not follow the trend), 19.4 , the mean will be inflated due to this value. However, this extreme value has no effect on the median. 2. Twelve tourists were asked to estimate the height, in metres, of a new building. Their estimates were as follows. (9709/62/O/N/19 number 1)

Give a disadvantage of using the mean as a measure of central tendency in this case. The mean will be unduly affected by the extreme value, 110 . 3. The heights, in cm, of the 11 basketball players in each of two clubs, the Amazons and the Giants, are shown below. (9709/52/M/J/21 number 7)

State an advantage of using a stem-and-leaf diagram compared to a box-and-whisker plot to illustrate this information. The stem-and-leaf diagram includes all the data, whereas the box-and-whisker plot does not.

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Advantages and disadvantages of Data Visualization

Data visualization is the change of crude information tables into numeric delineations that recount a story. Choosing what data to share, just as how to share it, are the two principal decisions in the making of a viz.

Data visualization can take numerous structures. As a rule, perceptions are diagrams, outlines, plots, and different types of mathematical clarifications. However, depending on it, information representation doesn’t end there. Guides, pictures, and air pocket diagrams are additional sorts of information perception. Any time you see a guide with nations featured for accentuation, you’re taking a gander at an information representation.

Also, the utilization of intelligent devices is viewed as the most elevated type of information representation. By and large, this just method the utilization of channels inside standard representations. For instance, envision you have a bar graph that shows the richness paces of the three most affluent nations in North America. An intuitive information perception may incorporate a drop-down menu so the client can change to another mainland. In the event that she chooses Europe, we would see the ripeness rates in Germany, France, and Italy.

We can’t fail to remember that the story part is critical. Information representation without a message behind isn’t information perception by any means. Information representation is a basic apparatus for chiefs across each business area and size. Regardless of whether you’re a startup or a worldwide partnership, information perception is fundamental in catching key data, helping dynamic, finishing serious examinations, planning, and drawing experiences.

Advantages of Data Visualization :

Better agreement – In business numerous a period it happens that we need to look at the exhibitions of two components or two situations. A conventional methodology is to experience the massive information of both the circumstances and afterward examine it. This clearly will kill a great deal of time.
A superior method – It can tackle the difficulty of placing the information of both perspectives into the pictorial structure. This will unquestionably give a superior comprehension of the circumstances. For instance, Google patterns assist us with understanding information identified with top ventures or inquiries in pictorial or graphical structures.
Simple sharing of data – With the representation of the information, organizations present another arrangement of the correspondence. Rather than sharing the cumbersome information, sharing the visual data will draw in and pass on across the data which is more absorbable.
Precise investigation – With the assistance of information perception, it gets more obvious the patterns and hence draws a superior surmising of the information. Accordingly, giving associations an edge over the adversaries.
Deals investigation – With the assistance of information representation, a salesman can without much of a stretch comprehend the business chart of items. With information perception instruments like warmth maps, he will have the option to comprehend the causes that are pushing the business numbers up just as the reasons that are debasing the business numbers. Information representation helps in understanding the patterns and furthermore different variables like sorts of clients keen on purchasing, rehash clients, the impact of topography, and so forth.
Discovering relations between occasions – A business is influenced by a lot of elements. Finding a relationship between’s these elements or occasions encourages chiefs to comprehend the issues identified with their business. For instance, the Online business market is anything but another thing today. Each time during certain happy seasons like Christmas or Thanksgiving the diagrams of online organizations go up. Along these lines, state if an online organization is doing a normal of a $1 million business in a specific quarter and the business ascends in straightaway, at that point they can rapidly discover the occasions comparing to it.
Adjustment of information – The solid purpose of information perception is that the information based on which the data is introduced in a visual configuration can be changed or altered along these lines giving a possibility for the business personals to build up a better correspondence with the crowd.
Investigating openings and patterns – With the huge loads of information present, the business chiefs can discover the profundity of information in regard to the patterns and openings around them. Utilizing information representation, the specialists can discover the examples in the conduct of their clients, subsequently preparing for them to investigate patterns and open doors for the business.
Geological perception – One of the solid purposes of information perception is geological representation. In this, specialists have the upside of area data giving information to day by day investigation.

Disadvantages of Data Visualization :

It gives assessment not exactness – While the information is exact in foreseeing the circumstances, the perception of similar just gives the assessment. It without a doubt is anything but difficult to change over the robust and protracted information into simple pictorial configuration yet such a portrayal of data may prompt theoretical ends now and then.
One-sided – The essential arrangement of information representation occurs with the human interface, which means the information that turns out to be the base of perception can be one-sided. The individual bringing the information for the equivalent may just think about the significant part of the information or the information that requirements center and may reject the remainder of the information which may prompt one-sided results.
Absence of help – One of the downsides of information perception is that it can’t help, which means an alternate gathering of the crowd may decipher it in an unexpected way.
Inappropriate plan issue – On the off chance that information perception is viewed as such a correspondence. At that point, it must be certifiable in clarifying the reason. In the event that the plan isn’t legitimate, at that point, this can prompt disarray in correspondence.
Wrong engaged individuals can skip center messages – One of the issues with information perception is however it could be logical its clearness in clarification is totally subject to the focal point of its crowd.

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IMAGES

Diagrammatic Presentation of Data: Meaning , Features, Guidelines
Diagrammatic Presentation of Data: Meaning , Features, Guidelines
Diagrammatic and Graphic Presentation of Data
Diagrammatic representation of data
Advantages and Disadvantages of Diagrammatic Representation
SOLUTION: Cours diagrammatic representation of data uses and

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