Evaluate the null hypothesis, Database Management System

Assignment Help:

1.Suppose you are given a dataset that consists of a random sample of tasters, on which the following variables were obtained:

(y) Zpref = taste preference for green beans stored in brine solution (data is centered)

(x1) saltc = level of salt in brine

(x2) sugarc = level of sugar in brine

(x3) saltc2 = salt*salt or salt-squared

(x4) sugarc2 = sugar*sugar or sugar-squared

The researchers are interested in how varying the levels of salt and/or sugar in a brine solution influence taste preferences of canned green beans packed in a brine solution. Please answer the following questions.

Notation: You may write models without subscripts

(e.g. y = b0 + b1 x1 + e is fine)

a. Write the full and restricted models which - in a models comparison framework - would evaluate the null hypothesis that neither salt nor sugar have a significant linear or curvilinear relationship with taste preference.

b. Using the full model from part a, write the restricted model that implies that sugar has no influence on taste preference.

c. Suppose you were to see the following SAS code in your program editor window:

PROC REG;

MODEL zpref = saltc sugarc saltc2 sugarc2;

QTERMS: Test saltc2=0, sugarc2=0;

In WORDS, what is the hypothesis being tested in the test statement labeled QTERMS?

Write the full and restricted models used to evaluate the QTERMS hypothesis.

d. Compared to the full model in a, write the restricted model that simultaneously implies that a) the linear effect of sugar conditional on level of salt is zero, AND b) the linear effects of salt and sugar are equal to each other, AND c) the curvilinear effects of salt and sugar are equal to each other. Give the SAS PROC REG code needed to evaluate this hypothesis.


Related Discussions:- Evaluate the null hypothesis

Project operation, The PROJECT operation The project operation is used t...

The PROJECT operation The project operation is used to choose the records with specified attributes as discarding the others based on some related criteria. This is denotes as ∏

Write the motivations led to development of oo-dbms, Write the motivations ...

Write the motivations led to development of OO-DBMS? 1.  Programmer frustration with RDBMSs. 2.  Requirement for special features.

Transactions and concurrency management, Transactions And Concurrency Manag...

Transactions And Concurrency Management  Introduction One of the main benefits of storing data in an integrated repository or a database is to permit sharing of it betwee

Top down method and bottom up method, Evaluate, compare and contrast the tw...

Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a meth

Give expression in tuple calculus and domain calculus, Consider the subsequ...

Consider the subsequent relation schemes:  Project (Project#, Project_name, chief_architect)  Employee (Emp#, Empname)  Assigned_To (Project#, Emp#)  Give expression i

Explain the benefit of oom, Explain the benefit of OOM. Main benefits o...

Explain the benefit of OOM. Main benefits of object oriented modeling are development of system become fast, quality of the system get improve. It gives freedom of use of alrea

Oracle, comparison of oracle RDBMS with MySQL

comparison of oracle RDBMS with MySQL

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