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

Linear Programming Problem, A paper mill produces two grades of paper viz.,...

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

Linear Programming models, In your own words, describe the special cases of...

In your own words, describe the special cases of integer programming and binary programming: what makes these problems different? Give an example of each, pointing out why they mus

Applications of statistics in management, In a business, statis...

In a business, statistics is used to study the demand and market characteristics of the product or service being sold. In fact, market research

Methods of scientific research, Methods is a tool or a techniques used t...

Methods is a tool or a techniques used to collect data. It is procedure for obtaining knowledge based on empirical observation and logical reasoning. Field Study Metho

Level of significance - hypothesis testing , Level of Significance I...

Level of Significance In testing a given  hypothesis  the maximum  probability with which  we would  be willing  to take  risk is called  level of  significance of the  test.

Problem, 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

Business Simulation Model, How much does cost for developing a simple model...

How much does cost for developing a simple model using Simuli 8 software and 2 pages write up (Explaining model). This is for my university assignment. For example last year assig

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