Parametric and non-parametric stats tests, statistics, Basic Statistics

Assignment Help:
What is the difference between parametric and non-parametric stats tests?
Different kinds or levels of data need to be analysed using different kinds of stats tests. The basic distinction between using a parametric or non-parametric test is between simple data:
Nominal – this means “named” data such as male/female, adult/juvenile, or tallies/counts of data such as the number of students taking maths at a college.
Ordinal – this means that your data is ordered in some simple way such as sea lions being classified as small, medium and large;
and complex data:
Interval – this is the same as ordinal data except that we know, for example, the actual length of small, medium and large sea-lions.
Ratio – this is the same as interval data except that it must make sense to have zero of the variable being measured. For example it is quite possible to get zero out of 20 in a math test but you cannot have zero personality, or zero height.

You also need to consider the distribution of your data before deciding upon a stats test. To use a parametric test data need to be normally distributed (form a bell shaped curve when plotted) – you can get your stats software programme to plot data for you, and check that the “skew” and “kurtosis” equal 1. If the data are not normally distributed and the skew and kurtosis do not equal 1 then you need to use a non-parametric test.

Related Discussions:- Parametric and non-parametric stats tests, statistics

Index number, Characteristics of index number

Characteristics of index number

Balance of payments and mobility of labor & capital, Balance of Payments, M...

Balance of Payments, Mobility of Labor and Capital, Trade and Wages Balance of Payments 1. Will a country running a trade deficit import or export capital?  Explain. 2.

Type of correlation, Which type of correlation would be appropriate to calc...

Which type of correlation would be appropriate to calculate for the each of the following sets of data? A.   Correlating gender and year in college (freshman, sophomore, junior,

Measure of dispersion, What are the uses of measures of dispersion in the f...

What are the uses of measures of dispersion in the field of civil engineering?

Explain the term “trial balance” and its needs, Explain the term “Trial Bal...

Explain the term “Trial Balance” and its needs for an organization. Ans. A Trial Balance is a statement of summarization of the all the involved ledgers accounts at the end of th

Plural sense, explain all the nature of statistics

explain all the nature of statistics

Why do organisations need a structure, Question 1: (a) The grouping of ...

Question 1: (a) The grouping of organisational activities (usually into ‘departments' or larger ‘divisions') will be done in different ways. Outline the criteria which can be u

Calculate a forecast using exponential smoothing, The Midwestern Manufactur...

The Midwestern Manufacturing Company (MMC) is a large manufacturer of electrical generators.  The firm has experienced demand for their generators as shown below: Year  Demand

Characteristics of statistics, Mention the characteristics of statistics. E...

Mention the characteristics of statistics. Explain any two application of Statistics

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