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

Determining sample size for estimating means-sample decisons, Determining S...

Determining Sample Size for estimatingMeans a. Acceptable Errors: There  may be several errors  in the  sample  size. The researcher  will have  to decide those  errors. Whic

Periodicals and serials - classification of documents, Periodicals and Seri...

Periodicals and Serials: Periodical publications form an important part of today's information world. It is one of the oft chosen forms of research communication. There are ov

information on research done, Information on Research Done Informatio...

Information on Research Done Information on Doctoral research work already done  is available from  the followings  sources: a. Bibliography of Doctoral  Dissertations Acce

Advantages of operations research, Operation Research may be regarded as a...

Operation Research may be regarded as a tool which is utilized to increase the effectiveness of the management decisions. O R is objective supplement to the subjective feeling

Mb0048, A paper mill produces two grades of paper viz., X and Y. Because of...

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 i

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

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 i

Operation Research, A paper mill produces two grades of paper viz., X and Y...

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 i

Operations research approach to problem solving, Formulation of the Problem...

Formulation of the Problem: Before proceeding to find the solution of a problem, first of all a manager should be competent enough to form an appropriate model. To do so f

Solve the following linear programming graphically, Problem based on graphi...

Problem based on graphical solution of a given LPP when feasible region is bounded. 1.    Solve the following linear programming graphically; Maximize and minimize z = 60x+

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