# SCRUTINY OF DATA IN STATISTICS

## About "Scrutiny of data in statistics"

Scrutiny of data in statistics :

Once the data are collected and always they have to be  verified for their homogeneity and consistency. This verification of data is called as scrutiny of data.

## Scrutiny of data in statistics

Since the statistical analyses are made only on the basis of data, it is necessary to check whether the data under consideration are accurate as well as consistence.

No hard and fast rules can be recommended for the scrutiny of data. One must apply his intelligence, patience and experience while scrutinizing the given information. ## Scrutiny of primary data

The data which are collected for the first time by an enumerator or agency are known as primary data

Errors in data may creep in while writing or copying the answer on the part of the enumerator. A keen observer can easily detect that type of error.

Again, there may be two or more series of figures which are in some way or other related to each other. If the data for all the series are provided, they may be checked for internal consistency.

As an example, if the data for population, area and density for some places are given, then we may verify whether they are internally consistent by examining whether the relation A good statistician can also detect whether the returns submitted by some enumerators are exactly of the same type thereby implying the lack of seriousness on the part of the enumerators.

The bias of the enumerator also may be reflected by the returns submitted by him.

This type of error can be rectified by asking the enumerator(s) to collect the data for the disputed cases once again.

## Scrutiny of secondary data

The data are known to be secondary if the data, as being already collected, are used by a different person or agency.

Always we have to be cautious, when we use the secondary data. Usually it is very difficult to verify such data and to edit them to find out inconsistencies, probable errors and omissions.

Scrutinizing the secondary data is vital, because the data may be inaccurate, unsuitable or inadequate.

In the words of Bowley, “It is never safe to take published statistics at their face value without knowing their meanings and limitations and it is always necessary to criticize arguments that can be based on them”.

Data collected by other people cannot be fully depend upon as they may contain many pitfalls and unless they have been thoroughly verified they should not be used.

After having gone through the stuff given above, we hope that the students would have understood "Scrutiny of data in statistics".

Apart from the stuff given above, if you want to know more about "Scrutiny of data", please click here

Apart from the stuff given on this web page, if you need any other stuff in math, please use our google custom search here.

HTML Comment Box is loading comments... WORD PROBLEMS

HCF and LCM  word problems

Word problems on simple equations

Word problems on linear equations

Word problems on quadratic equations

Algebra word problems

Word problems on trains

Area and perimeter word problems

Word problems on direct variation and inverse variation

Word problems on unit price

Word problems on unit rate

Word problems on comparing rates

Converting customary units word problems

Converting metric units word problems

Word problems on simple interest

Word problems on compound interest

Word problems on types of angles

Complementary and supplementary angles word problems

Double facts word problems

Trigonometry word problems

Percentage word problems

Profit and loss word problems

Markup and markdown word problems

Decimal word problems

Word problems on fractions

Word problems on mixed fractrions

One step equation word problems

Linear inequalities word problems

Ratio and proportion word problems

Time and work word problems

Word problems on sets and venn diagrams

Word problems on ages

Pythagorean theorem word problems

Percent of a number word problems

Word problems on constant speed

Word problems on average speed

Word problems on sum of the angles of a triangle is 180 degree

OTHER TOPICS

Profit and loss shortcuts

Percentage shortcuts

Times table shortcuts

Time, speed and distance shortcuts

Ratio and proportion shortcuts

Domain and range of rational functions

Domain and range of rational functions with holes

Graphing rational functions

Graphing rational functions with holes

Converting repeating decimals in to fractions

Decimal representation of rational numbers

Finding square root using long division

L.C.M method to solve time and work problems

Translating the word problems in to algebraic expressions

Remainder when 2 power 256 is divided by 17

Remainder when 17 power 23 is divided by 16

Sum of all three digit numbers divisible by 6

Sum of all three digit numbers divisible by 7

Sum of all three digit numbers divisible by 8

Sum of all three digit numbers formed using 1, 3, 4

Sum of all three four digit numbers formed with non zero digits

Sum of all three four digit numbers formed using 0, 1, 2, 3

Sum of all three four digit numbers formed using 1, 2, 5, 6