Completely randomized design, Basic Statistics

Assignment Help:
Ask question #MinimumAgency revenues. An economic consultant was retained by a large employment agency in a metropolitan area to develop a regression model for predicting monthly agency revenues ( y ). She decided that three economic indicators for the area were potentially useful as independent variables, namely, average weekly overtime hours of production workers in manufacturing ( 1 x ), number of job vacancies in manufacturing ( 2 x ), and index of help wanted advertising in newspapers ( 3 x ). Monthly observations on agency revenues and the three independent variables were obtained for the past 25 months. The ANOVA table for the model is as follows:

1479_Determine the subset of variables.png

The consultant decided to screen the independent variables to determine the best set for predicting agency revenues. The regression sums of squares for all possible regression models were found to be as follows:

1358_Determine the subset of variables1.png

(a) Determine the subset of variables that is selected as best by the forward selection procedure using F0* = 4.2 (to-add-variable). Show your steps.

(b) Determine the subset of variables that is selected as best by the backward elimination procedure using F0** = 4.1 (to-delete-variable). Show your steps.

NOTE: ( t0** ) 2 = F0**

(c) Determine the subset of variables that is selected as best by the stepwise regression procedure using F0* = 4.2 (to-add) and F0**
= 4.1 (to-delete). Show your steps.

Related Discussions:- Completely randomized design

Operation research, meaning,definition,scope,origin,advantages and limitati...

meaning,definition,scope,origin,advantages and limitation of operation research ?

find the return period of critical event, A drainage system overows into a...

A drainage system overows into a river causing pollution when the rainfall falling in an hour exceeds 50 mm. During any given year, the maximum hourly rainfall follows an exponenti

Surveys by mailing of questionnaires, The researcher and the respondents d...

The researcher and the respondents do not come in contact with each other if this method of survey is adopted Questionnaires are mailed to the respondents with a request to re

What is the cumulative distribution function, The waiting time for an incom...

The waiting time for an incoming call at the front desk of mathematics Department follows an exponential distribution. During business hours, the average of the waiting times is 10

Biostatistics, when testing hypothesis is the level of significanc the type...

when testing hypothesis is the level of significanc the type error I?

Frequency, midpoint of class containing highest frequency

midpoint of class containing highest frequency

Psy1110 Module 2, Which of the following does Utts consider a disaster in s...

Which of the following does Utts consider a disaster in sampling?sk question #Minimum 100 words accepted#

Probablity, a fair die is thrown 3 times.let X1,X2,X3 denote results of 3 t...

a fair die is thrown 3 times.let X1,X2,X3 denote results of 3 throws.what is the probablity that p[X1>X2+X3]

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