Assessing the Effect of Five Gasoline Properties on Exhaust Emissions from Light-Duty Vehicles certified to Tier-2 Standards

                       Analysis of Data from EPA Phase 3

                                (EPAct/V2/E-89)

                                 Appendix J.4
                              Final Model Fitting
                        Particulate Matter (PM) (Bag 1)

No. Observations:			   910
No. Vehicles:		  		     15
No. censored measurements:		     45
No. missing measurements:		       0
No. measurements removed:		       1
Model Type:				Tobit regression

J.4.1  Model Fitting based on the 11-term design model.

     Models fit for PM (Bag 1): (Grand Intercept not fit by Tobit models).
Model Term
                                   Notation
                                     Model

                                     Full
                                    FM2[1]
                                      FM3
                                      FM4
                                      FM5
                                      FM6
                                     etOH
Ze
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                     Arom
Za
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      RVP
Zr
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      x
                                      T50
Z5
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      T90
Z9
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                 etOH x etOH
ZZee
                                      ●
                                      x

                                  T50 x T50
ZZ55
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                 etOH x Arom
ZZea
                                      ●
                                      ●
                                      ●
                                      x

                                  etOH x RVP
ZZer
                                      ●
                                      ●
                                      x

                                  etOH x T50
ZZe5
                                      ●
                                      x

                                  etOH x T90
ZZe9
                                      ●
                                      ●
                                      ●
                                      ●
                                      x

  PM (Bag 1): Model fitting history, starting with the 11-term design model.
                                Fit Parameters

                             Test with respect to
                                Previous Model
Model
                                                                         p-1[1]
                                     -2lnL

                                                                           Dev.
                                                                              d
                                                                    Pr>χ[2]
Full Model
                                                                             11
                                                                       2789.671

FM2
                                                                              9
                                                                       2790.118

0.447
                                                                              2
0.800
FM3
                                                                              8
                                                                       2791.074

0.956
                                                                              1
0.328
FM4
                                                                              7
                                                                       2793.414

2.34
                                                                              1
0.126
FM5
                                                                              6
                                                                       2796.069

2.655
                                                                              1
0.103
FM6[2]
                                                                              5
                                                                       2796.308

0.239
                                                                              1
0.625

[1] Total number of terms excludes the intercept, as the Tobit
models do not fit intercepts.
[2] Best fit with respect to the 17-term extended model.

PM (Bag 1): Coefficients and Tests of Effect for the Full and Reduced Models, with respect to the 11-term design model.

J.4.2 Model Fitting based on the 17-term extended model.

     Models fit for PM (Bag 1): (Grand Intercept not fit by Tobit models).
Model Term
                                   Notation
                                     Model

                                     Full
                                    FM3[1]
                                      FM5
                                      FM6
                                      FM7
                                      FM8
                                      FM9
                                     FM10
                                     etOH
Ze
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                     Arom
Za
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      RVP
Zr
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      x
                                      T50
Z5
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      T90
Z9
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                 etOH x etOH
ZZee
                                      ●
                                      x

                                  T50 x T50
ZZ55
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                 etOH x Arom
ZZea
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      x

                                  etOH x RVP
ZZer
                                      ●
                                      x

                                  etOH x T50
ZZe5
                                      ●
                                      ●
                                      x

                                  etOH x T90
ZZe9
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●

                                  T90 x T90
ZZ99
                                      ●
                                      ●
                                      ●
                                      ●
                                      x

                                  Arom x RVP
ZZar
                                      ●
                                      ●
                                      ●
                                      x
                                      ●
                                      ●
                                      ●
                                      ●
                                  Arom x T50
ZZa5
                                      ●
                                      x

                                  Arom x T90
ZZa9
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                  T50 x T90
ZZ59
                                      ●
                                      ●
                                      x

                                  RVP x T90
ZZr9
                                      ●
                                      ●
                                      ●
                                      ●
                                      ●
                                      x

[1] Indicates "Full minus 3," etc.

 PM (Bag 1): Model fitting history, starting with the 17-term extended model.
                                Fit Parameters

                             Test with respect to
                                Previous Model
Model
                                                                         p-1[1]
                                     -2lnL

                                                                           Dev.
                                                                              d
                                                                    Pr>χ[2]
Full Model
                                                                             17
                                                                       2804.455

FM3
                                                                             14
                                                                       2804.778

0.323
                                                                              3
0.956
FM5
                                                                             12
                                                                       2805.586

0.808
                                                                              2
0.668
FM6
                                                                             11
                                                                       2806.743

1.157
                                                                              1
0.282
FM7
                                                                             10
                                                                       2809.264

2.521
                                                                              1
0.112
FM8
                                                                              9
                                                                       2811.736

2.472
                                                                              1
0.116
FM9
                                                                              8
                                                                       2813.991

2.255
                                                                              1
0.133
FM10[2]
                                                                              7
                                                                       2814.388

0.397
                                                                              1
0.529

                                                                              7

[1] Total number of terms excludes the intercept, as the Tobit
Models do not fit intercepts.
[2] Best fit with respect to the 17-term extended model.

PM (Bag 1): Coefficients and Tests of Effect for the Full and Reduced Models, with respect to the 17-term extended model.


[Federal Register Volume 88, Number 25 (Tuesday, February 7, 2023)]
[Notices]
[Pages 8038-8039]
[FR Doc No: 2023-02595]

-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

[Docket No. DOT-OST-2003-15623]

Agency Request for Extension of a Previously Approved Information
Collection: Use and Change of Names of Air Carriers, Foreign Air
Carriers, and Commuter Air Carriers

AGENCY: Office of the Secretary, DOT.

ACTION: Notice and request for comments.

-----------------------------------------------------------------------

SUMMARY: The Department of Transportation (DOT) invites public comment
about our intention to request the Office of Management and Budget
(OMB)'s approval to extend an information collection. The collection
involves information from air carriers who seek new, reissued, or
transferred authority in a new name or use of a trade name. We are
required to publish this notice in the Federal Register by the
Paperwork Reduction Act of 1995.

DATES: Written comments should be submitted by April 10, 2023.

ADDRESSES: You may submit comments [identified by Docket Number DOT-
OST-2003-15623] by any of the following methods:
     Website: http://www.regulations.gov. Follow the online
instructions for submitting comments.
     Fax: 1-202-493-2251.
     Mail or Hand Delivery: Docket Operations Office, U.S.
Department of Transportation, 1200 New Jersey

Avenue SE, West Building, Room W12-140, Washington, DC 20590, between 9
a.m. and 5 p.m., Monday through Friday, except on Federal Holidays.

FOR FURTHER INFORMATION CONTACT: Barbara Snoden,<PHONE_NUMBER>, Office
of Aviation Analysis, Office of the Secretary, U.S. Department of
Transportation, 1200 New Jersey Avenue SE, Washington, DC 20590.

SUPPLEMENTARY INFORMATION:
    OMB Control Number: 2106-0043.
    Title: Use and Change of Names of Air Carriers, Foreign Air
Carriers, and Commuter Air Carriers.
    Type of Request: Extension of a previously approved collection.
    Background: In accordance with the procedures set forth in 14 CFR
part 215, before a holder of certificated, foreign, or commuter air
carrier authority may hold itself out to the public in any particular
name or trade name, it must register that name or trade name with the
Department, and notify all other certificated, foreign, and commuter
air carriers that have registered the same or similar name(s) of the
intended name registration.
    Respondents: Persons seeking to use or change the name or trade
name in which they hold themselves out to the public as an air carrier
or foreign air carrier.
    Estimated Number of Respondents: 12.
    Estimated Total Burden on Respondents: 60 hours.
    Public Comments Invited: You are asked to comment on any aspect of
this information collection, including (a) Whether the proposed
collection of information is necessary for the Department's
performance; (b) the accuracy of the estimated burden; (c) ways for the
Department to enhance the quality, utility and clarity of the
information collection; and (d) ways that the burden could be minimized
without reducing the quality of the collected information. The agency
will summarize and/or include your comments in the request for OMB's
clearance of this information collection.
    Authority: The paperwork Reduction Act of 1995; 44 U.S.C. chapter
35, as amended; and 49 CFR 1:48.

    Issued in Washington, DC, on February 2, 2023.
Lauralyn Jean Remo Temprosa,
Associate Director, Air Carrier Fitness Division, Office of Aviation
Analysis.
[FR Doc. 2023-02595 Filed 2-6-23; 8:45 am]
BILLING CODE 4910-9X-P