Z-test - hypothesis testing, Operation Research

Assignment Help:

Z-Test

Prof. Fisher has  given a method  of testing the significance of the correlation coefficient in small  samples. According  to this method the  coefficient of correlation is transformed into Z  and hence the  name  transformation. The statistic Z given by  prof. Fisher is used  to test:

a.Whether  an observed value  of r differs significantly from some  hypothetical value or.

b.Whether two samples values of  r differ significantly,

For  testing whether r differs significantly from zero the t- test is preferable.

In order to apply the test  we have to calculate Z and by applying Fisher transformation and then  calculate the  value  of the standard  normal  variate.

                 Z- ε / 1/√n-3


Related Discussions:- Z-test - hypothesis testing

Macroeconomic environment in which the business operates, Provide a descrip...

Provide a description of the macroeconomic environment in which the business operates noting: a) The overall 'stability' of the political system/government of the country in whi

Calculate, A paper mill produces two grades of paper viz X and Y. Because o...

A paper mill produces two grades of paper viz X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper in

Inability of nih, Inability of NIH, FDA, to Identify Conflict of Interest ...

Inability of NIH, FDA, to Identify Conflict of Interest While federal regulations require that researchers receiving NIH grants remain free of financial conflicts of interest,

OR models, Explain why it may be advantageous to build models to help in so...

Explain why it may be advantageous to build models to help in solving a decision problem.

Pamphlets and Patents - classification of documents, Pamphlets - classifica...

Pamphlets - classification of documents: A pamphlet is an independent publication. It is normally a document of a few printed pages, usually less than 49. Pamphlets cover an e

Action phase - phase of operation research, The action phase consists of ...

The action phase consists of making recommendations for remedial action to those who first posed the problem and who control the operations directly. These recommendatio

data analysis and research methodology , Case  Study - Data Analysis ...

Case  Study - Data Analysis Sandarsen  inc was testing new  packaging  and a few  recipe  for a family  desert cookie  that had  been  on the  market for several years. It wa

Formulate this as a Linear Programming Problem, A paper mill produces two g...

A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y pa

Describe states-transitions and transition rate, Customers arrive to a supe...

Customers arrive to a super market according to a Poisson process with intensity V = ½  per minute. The supermarket has two counters, that use a common queue. Counter 1 is always o

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