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

Weaning and definition, Weaning  and Definition A systematic  arrange...

Weaning  and Definition A systematic  arrangement of classified  data in labelled columns and  rows  is  known  a statistical table. Turtle has given  a comprehensive defin

ASSIGNMENT ANSWER, Six Operators are to be assigned to five jobs with the c...

Six Operators are to be assigned to five jobs with the cost of assignment in Rs. given in the matrix below. Determine the optimal assignment. Which operator will have no assignment

Degrees of freedom, Determining Degrees of Freedom   One of the prer...

Determining Degrees of Freedom   One of the prerequisites for using chi square test is that we should calculate the number of degrees of freedom for the contingency table. T

Goal programming, Goal Programming This provides a more realistic model...

Goal Programming This provides a more realistic model. In a modern setting, profit maximization may not be the only objective of a business concern. Other objectives or goals c

Network problem, Consider the following network where the value on each arc...

Consider the following network where the value on each arc represents the capacity of that arc. Use the augmenting path algorithm to find the value of the maximum flow from node 1

What strategies may be used in gaining acceptance, QUESTION a) "Organiz...

QUESTION a) "Organizations have to change only because changes in their external environments force them to change." Discuss b) What restraining forces may block the impleme

Distribution methods, 1: explain vogel''s approximation method? 2: explain ...

1: explain vogel''s approximation method? 2: explain optimality test?

Operation reaserch, 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

Assignment problems, Six Operators are to be assigned to five jobs with the...

Six Operators are to be assigned to five jobs with the cost of assignment in Rs. given in the matrix below. Determine the optimal assignment. Which operator will have no assignment

LPP, . 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

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