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, 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

#titleAssignment Problem.., Six Operators are to be assigned to five jobs w...

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

Sequencing problem, how do you use gantt chart for solving sequencing probl...

how do you use gantt chart for solving sequencing problem ? why is it not employed for solving larger problems?

Techniques of work measurement, Techniques  of Work  Measurement A n...

Techniques  of Work  Measurement A number of work  measurement  techniques  have been  developed  to suit  different  types of work . There are: 1. Repetitive work: The

Graphic , max z 60x1+50x2 Sab to 4x1+10x2 2x1+2x2 3x...

max z 60x1+50x2 Sab to 4x1+10x2 2x1+2x2 3x1+2x2 X1+x2. >_ o

Advantages of mean deviation - measure of dispersion, Advantages  of Mea...

Advantages  of Mean  Deviation a.It is based on all the  observation . any  change in any  item would  change the value of mean  deviation. b.Mean  deviation  is less  aff

Disadvantages of mode - measure of central tendency , Disadvantages of Mode...

Disadvantages of Mode a.It is  ill defined. b.It is  indefinite  and it is  some cases impossible  to find a definite  value. c.It is not based on all observation. So  i

Mean deviation - measure of dispersion, MEAN DEVIATION Mean  deviati...

MEAN DEVIATION Mean  deviation of a series is the arithmetic  average of the  deviations of various  items  from the  median  or mean  of that series. Median is preferred

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