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

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.
Posted Date: 2/9/2012 2:56:06 AM | Location : United States







Related Discussions:- Parametric and non-parametric stats tests, statistics, Assignment Help, Ask Question on Parametric and non-parametric stats tests, statistics, Get Answer, Expert's Help, Parametric and non-parametric stats tests, statistics Discussions

Write discussion on Parametric and non-parametric stats tests, statistics
Your posts are moderated
Related Questions

A company prepares dinners for several airlines, and sales average 300,000 meals per month. The significant costs of each dinner prepared are for the meat, veg,plastic trays, and u

APPROVING MANAGER An individual within an agency who is responsible for assigning buy card custodians and developing buy card limits within the organization.

After analyzing the data the researcher has to test ten hypotheses various tests such as chi square test t test have been developed by statisticians for the purpose. The hypotheses

I have a midterm coming up the teacher is allowing us to have a front & back cheats on anything we want on it. Is there a way you guys can make me one?


A survey was conducted among the residents of Pune City, its suburbs and the PuneCantonment area. The following three pie diagrams show their respective preferences for living in C

Card custodian An person who is assigned responsibility of purchase card security & issuance of cards to authorized users,

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 dist

Find the value of E (i+). Show your calculation. i=7 i=3