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

Shoppers Stop, How should Shopper’s Stop develop its demand forecasts?

How should Shopper’s Stop develop its demand forecasts?

Management approach to entrepreneurial theory, The management approach woul...

The management approach would advocate the position that entrepreneurs can be made. Discuss the management approach to entrepreneurial theory by making reference to the key researc

Duty drawback scheme, DUTY DRAWBACK SCHEME: The scheme of Duty Drawback is...

DUTY DRAWBACK SCHEME: The scheme of Duty Drawback is governed by the 'Customs and Central Excise Duties Drawback Rules' compiled and notified by 'Drawback Directorate' of the Depa

Export under claim of rebate under rule 12, Export Under Claim of Rebate Un...

Export Under Claim of Rebate Under Rule 12(i) (A) Under the Central Excise Rule 12(i) (A), rebate of duty paid on export of duty paid goods shall be granted. The rule permits t

Benefit segmentation in regard to consumer behaviour, Explain Lifestyle and...

Explain Lifestyle and Psychographic Segmentation and benefit segmentation in regard to consumer behaviour. Ans: For several years demographics have governed how communication t

Marketing, The credit bank which offers a full range of financial services ...

The credit bank which offers a full range of financial services to the costumers had recently carried out a segmentation exercise which defined four age based segment of potential

Central excise formalities, CENTRAL EXCISE FORMALITIES : It is a common pr...

CENTRAL EXCISE FORMALITIES : It is a common practice all over the world that the exports are not to bear the burden of indirect taxes. Export goods are either exempted from such t

State the term- production, State the term- Production Research assist...

State the term- Production Research assists you in an enterprise to decide in the field of production on:- What to produce How much to produce When to produce

Ethical and above-board approach in marketing research, Question 1: "De...

Question 1: "Decision makers and researchers usually use the ideas generated in secondary data as a very strong foundation to primary data design and collection. However, they

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