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

What is convergent validity, What is Convergent validity Convergent val...

What is Convergent validity Convergent validity is the extent to which scale correlates positively with other measures of same construct. It isn't essential that all these meas

Explain marketing concept and the societal marketing concept, Question 1: ...

Question 1: The product manager when introducing a new product wants the product to enjoy a long and happy life. (a) How will the ‘life' of a product be conceptually analyse

Examine a range of marketing strategy , Examine a range of general or marke...

Examine a range of general or marketing strategy options (a) Discuss a variety of general and marketing strategic options which are available to your organisation and evaluate t

Procedures for furnishing the forms, Procedures for Furnishing the Forms : ...

Procedures for Furnishing the Forms : The declaration form GR (in duplicate) shall be submitted in duplicate to the commissioner of Customs. After duly verifying and authenticatin

Foreign exchange-exchange control, FOREIGN EXCHANGE : Foreign exchange, as...

FOREIGN EXCHANGE : Foreign exchange, as defined under Foreign Exchange Regulation Act. 1973 is foreign currency and includes: i) All deposits credit and balance payable in fore

Basic aspects of buying centre, The basic aspects to be noted about the buy...

The basic aspects to be noted about the buying centre are that: --The influences across the centre can differ from one product category to another. --The composition itself

Personality impacts and perception influences decisions, Q. Personality imp...

Q. Personality impacts and Perception influences decisions? Variety seeking where consumers look for to try new brands not because these brands are expected to be better i

Form of contract-nature of export sales contract, Form of Contract: Th...

Form of Contract: There are no universally acceptable norms as to the form of export contracts. It need not be a formal document signed by both the parties and it need to be s

Purpose of writing research report, PURPOSE OF WRITING RESEARCH REPORT ...

PURPOSE OF WRITING RESEARCH REPORT Three main purposes are there for writing a research report. These are: i) Writing report for partial fulfillment of your degree. ii)

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