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

SIMPLEX METHOD, Solve the following Linear Programming Problem using simple...

Solve the following Linear Programming Problem using simple method Maximize Z= 3x1 + 2x2 Subject to the constraints: X1 + X2 = 4

Construction procedure for research tool, CONSTRUCTION PROCEDURE The c...

CONSTRUCTION PROCEDURE The construction of an interview schedule or questionnaire is a time consuming task requiring considerable attention to all the details. The investig

Chi square test goodness of fit- hypothesis testing, Chi Square  Test Good...

Chi Square  Test Goodness of Fit Chi square test  can be used to find out  how well the  theoretical distribution fit  with the  empirical distribution  of observed distribut

Panel sampling - sampling decisions, Panel Sampling Here the initial  s...

Panel Sampling Here the initial  samples are down  on random  basis  and information  from  these is collected  on regular  basis. Itis  semi permanent sample where members may

Investigate the link between engine wear and mileage, The Association of Ma...

The Association of Malawi Mechanics has commissioned a study to investigate the link between engine wear and mileage. The main focus of the study is to determine whether the mileag

Linear programming , the application areas of linear programming

the application areas of linear programming

Two sample tests- hypothesis testing, Two Sample Tests In some  situat...

Two Sample Tests In some  situation the researchers may be taking  statistical decisions based on two samples. Each  of the  two  samples may  represent a particular under con

Research methodology, The influence of daily life of keeping dogs Part ...

The influence of daily life of keeping dogs Part a) Qualitative data analysis: These activities are aimed at developing skills in basic qualitative data analysis Inte

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