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

Time series, discuss the nature and causes of the components of an economic...

discuss the nature and causes of the components of an economic time series?

Create a spreadsheet model and determine linear regression, 1. MMC's CEO, D...

1. MMC's CEO, Dr. Warren A. Beatty (Not the actor) believes that the demand trend for MMC is essentially linear. Thus, he wishes to determine if linear regression would be an effec

Binomial expansion, what is the largest coefficient of (1+3x)^4 is ?

what is the largest coefficient of (1+3x)^4 is ?

Regression, Sales from a leading motor dealership were monitored over the p...

Sales from a leading motor dealership were monitored over the past four years. The sales figures are presented in the accompanying table. Year Quarter 1 Quarter 2 Quarter 3 Quarter

Index numbers, What are the advantages and disadvantages of index numbers

What are the advantages and disadvantages of index numbers

Jurnal entry, Depreciation on the company''s equipment for 2011 is computed...

Depreciation on the company''s equipment for 2011 is computed to be $16,000.

Calculate the investments through model, Anna is considering investing $150...

Anna is considering investing $150,000 by dividing it into three investments. But she is not sure how much to put in each one. The first investment is known to follow a uniform dis

50p3, How do I calculate 50p3?

How do I calculate 50p3?

Statistic using IBM SPSS, Comment on the sample size, measure of central te...

Comment on the sample size, measure of central tendency, dispersion, kurtosis, and skewness.Use the z -scores in the book (or calculate your own) to provide this response. What doe

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