Why should a researcher do a normality, Marketing Research

Assignment Help:

Why should a researcher do a normality and outliers' assessment before hypotheses testing?

Answer

To conduct many advance statistical techniques, researchers have to presume that data provided is normal (means it's symmetrical on a bell curve) and free of outliers. In general terms, if data was plotted on a bell curve, highest number of data points would be available in the middle and the data points would reduce on either side in a proportional fashion as we move away from the middle. Normality and outliers analysis offers clarity with regard to fundamental assumption of many advance statistical techniques. Skewness and kurtosis analysis can provide some idea with regard to normality. Positive skewness values suggest clustering of data points on the low values (left hand side of the bell curve) and negative skewness values suggest clustering of datapoints on high values (right hand side of bell curve).

Positive kurtosis values suggest that datapoints have peaked (gathered in centre) with long thin tails. Kurtosis values below 0 suggest that distribution of datapoints is comparatively flat (i.e. too many cases in extreme). In a way, without normality and outlier's assessment researcher may get false results which might result in wrong conclusion and decision making.

 


Related Discussions:- Why should a researcher do a normality

Marketing reasearch process, Marketing Reasearch Process: 1. specifyin...

Marketing Reasearch Process: 1. specifying research objectives: In this step of the research process researchers must first obtain answer to the question," what is the purpos

Moving averge, inn moving average method, we need data of atleast a) three ...

inn moving average method, we need data of atleast a) three years b) four Years c) five years d) six years

Prohibition of export, Prohibition of Export : Export of all goods either ...

Prohibition of Export : Export of all goods either directly or indirectly to any place outside India other than Nepal and Bhutan is prohibited unless the exporter furnishes to the

Explain different market segments in given problem, Q. Explain different ma...

Q. Explain different market segments in given problem? You should identify two competing products or services that aim at different market segments. Ideally one of these should

General reserch, How student strike effect on Quebec? How student strike ef...

How student strike effect on Quebec? How student strike effect on other province of Canada? Which people are involved in it? (Students and people who want Quebec different from Can

Rate of interest, Rate of Interest: The interest payable on pre-shipment f...

Rate of Interest: The interest payable on pre-shipment finance is usually lower than the normal rate, provided the credit is extinguished by lodging the export bills on remittance

Consumer behavior, prepare a list of five products by your family.indicate ...

prepare a list of five products by your family.indicate who is the information gatherer, the influencer, the decision maker, the purchaser and the user

Give a overview of organizational buying behavior, Q: Give a descriptive ov...

Q: Give a descriptive overview of organizational buying behavior? Ans: Selling strategies that objective the organisational customer and use the concept of the buying centre bu

Meaning of credit risk, MEANING OF CREDIT RISK : Competition In foreign ma...

MEANING OF CREDIT RISK : Competition In foreign markets is keener than in the domestic market. Overseas customers are sought after by exporter from many countries. Competition is

Explain psychoanalytical model of consumer behaviour, Q. Explain Psychoanal...

Q. Explain Psychoanalytical model of consumer behaviour? This model is on the basis of work of psychologists who were concerned with personality. They were of the outlook that

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd