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
EFF EX: Joe, you said you put in these peanuts because some people ask for them, but do you realise what this rack of peanuts is costing you? JOE: It ain''t gonna cost. ''sgonna be

A company determines that the profit (P) in Pula and the advertising expenditure (e) in Pula have a linear relationship. a) Find an equation of linear relationship

If in a hall there are 18 persons then how many handshakes are possible?

Job Order Gosting ln an attempt to conceal a thefi of funds, Kaito Kid, controller of Shinichi Products, lnc. placed a bomb in the company s record vault. The ensuing explosion lef

Least squares method of fitting a line ( the line of best fit or the regression line) through the scatter diagram is a method which minimizes the sum of squared vertical deviations


Company hopes to improve customer satisfaction, setting a goal of no more than 5% negative comments. A random survey of 350 customers found only 14 with complaints. Does this provi

I roll a fair die n times and don’t see the face 1 in the first r rolls (r

KINDLY ASSIST ME WITH THIS ASSIGNMENT AND FORWARD IT TO ME BY 31 OCTOBER 2013.

Why do we particularly omit the middle year when using the semi-average method to fit a trend line