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

Carry out resource levelling for equipment resource, Teesside Construction ...

Teesside Construction is developing a schedule for a major building project to start in 04/01/2011 in Middlesbrough, UK. The project manager has identified major activities of the

Simple size -sampling decisions, simple Size When a survey  is underta...

simple Size When a survey  is undertaken and  it is not  possible  to cover  the entire population, the marketing  researcher has to  answer a basic  question  - how  large  s

LInear Programming, - A paper mill produces two grades of paper viz., X an...

- 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 pape

Simplex, Maximize Z = 2x - 7y subject -2x + 3y = 3 4x + 5y >= 10 6x + 7y 4...

Maximize Z = 2x - 7y subject -2x + 3y = 3 4x + 5y >= 10 6x + 7y 4x + 8y >= 5

Tied ranks equal or repeated rank, Tied Ranks Equal or Repeated Rank W...

Tied Ranks Equal or Repeated Rank When  two or more  items  have equal values  it is  difficult  to give ranks  to them. In  that case  the items are given  the average of the

Operations research, What are artificial variable why do you need them

What are artificial variable why do you need them

Explain the process of problem identification with an exampl, Question ...

Question 1 Explain the process of problem identification with an example 2 Interview method involves a dialogue among the Interviewee and the Interviewer. Describe the inter

MODERN MANAGEMENT, DISCUSS THE SIGNIFICANCE AND SCOPE OF OPERATION RESEARCH...

DISCUSS THE SIGNIFICANCE AND SCOPE OF OPERATION RESEARCH IN MODERN MANAGEMENT

Operations Decision, 2.Assess the current environmental scan factors that a...

2.Assess the current environmental scan factors that are relevant to the decision making process. Determine the factors that will have the greatest impact on plant operations and m

Scattered responsibility and authority, Scattered Responsibility and Autho...

Scattered Responsibility and Authority: In a big industry responsibility and authority of decisions making is scattered throughout the organization and thus the organization.

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