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

Internal and external criterai of research problem, AskWhat are the interna...

AskWhat are the internal and external criteria of selecting a research problem?

Negotiation of export documents under letters of credit, Negotiation of Exp...

Negotiation of Export Documents under Letters of Credit : Where the exports are under letter of credit arrangements, the banks will negotiate the export bills provided it is drawn

Discuss porter''s five forces analysis, Question 1 Describe the steps invo...

Question 1 Describe the steps involved in healthcare marketing process Question 2 What is marketing mix? Explain the four P's of the marketing mix Question 3 Discu

Excise rebate policy, Excise Rebate Policy : The scheme under which the Ce...

Excise Rebate Policy : The scheme under which the Central Excise exemption or refund is provided is popularly known as Rebate of Central Excise. This scheme operates under Section

Marketing principles, give examples of different product strategies used by...

give examples of different product strategies used by different similar companies to sustain competitive advantages and justify wether thestrategies have been successful

Marketing Management, what are the significant factors that have led to the...

what are the significant factors that have led to the success of shoppers’ stop

Brand promotion, brand promotion technique can benefit an organization by i...

brand promotion technique can benefit an organization by increasing its sales or hitting competitive brands may leave a negative impression on the customers?

Compare descriptive and causal reserach design, Compare and contrast explor...

Compare and contrast exploratory, descriptive and causal research designs. Answer Objective of exploratory design is to discover ideas and insights; of descriptive design

Foreign exchange regulation concerning exports, FOREIGN EXCHANGE REGULATION...

FOREIGN EXCHANGE REGULATION CONCERNING EXPORTS : Export of goods is the most important foreign exchange earner for the country and the law provides that foreign exchange in paymen

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