What is Data?

Why we should learn about data?let us take look at some amazing applications first,As we all know some services want feedback from us...Why they need our feedback...Yes,they want to give satisfaction to us through there services...What data play role in this?As customers satisfies with services then the business will grow well and every company and business persons want to make more money through providing a quality service...How they do it?The simple answer is that they analyse there services..For this purpose they require data...So today we will see some information about data and its types...

Types of data

Data is mainly classified into two parts

Categorical

Categorical Data represents groups or categories

Examples:   Laptop brands-Hp,Dell,Mac etc., Answers to yes/no questions- yes or no.

           


Numerical

 Numerical data represent numbers. It is divided into two groups: Discrete and Continuous.Discrete data can be usually counted finitely, while continuous is infinite(countably) and impossible(not always) to count.

Discrete: * Number of children in class, Grades at University-0 to 100 %, Number of Objects- Bottles, glasses, tables or car

Continuous -Height, Area, Distance, Time

Levels of measurement

1) Qualitative: A variable that categorizes or describes a population element.Arithmetic operations such as addition and averaging are meaningless for data resulting from a qualitative variable.

Qualitative is classified into the following two levels:

  • Nominal
  • Ordinal

The nominal level represents categories that cannot be put in any order, while ordinal represents categories that can be ordered.

Examples:  Nominal: four seasons (winter, spring, summer, autumn),Ordinal: ratings to service(disgusting, Good,Better,Best)


2) Quantitative: A variable that quantifies a population element.Arithmetic operations, such as addition and average, are meaningful for data resulting from a quantitative variable.

There are two quantitative levels-interval and ratio.

They both represent “numbers”; however, ratios have a true zero, while intervals don’t.

Example - Interval (degrees Celsius and Fahrenheit),Ratio(degree Kelvin)


THANKS FOR READING...

Content created by- Chandrashekhar Awate and Priyanka Pawar





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