Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Lunars using Bennett
    From: Peter Fogg
    Date: 2008 Apr 5, 18:33 +1100

    Alex, you wrote:
    > I have to say that several years ago
    > I decided not to
    > participate in any discussion of statistics on
    > this list.
    
    However, your statement:
    >  The tables in Bennett do not have sufficient
    >  accuracy ... because they are
    >  rounded to 1'.
    >  ... and the errors will accumulate).
    seems inconsistent with this decision.
    
    And that "will accumulate" seems inconsistent with:
    >  They will do both things: cancel but still
    >  accumulate.
    
    Bill Noyce, you wrote:
    > I only bothered to look at the first two lines of data presented ...
    
    If 100 was a small sample then 12 is even smaller!  What does this
    0.61 indicate? That values that are either rounded up or down will, on
    average, have a rounding 'error' of 0.5?
    
    I'm not sure that this much is in contention.  The claim leading to
    the experiment was that the roundings could add up to an error of 3
    minutes of arc (0.5x6).  Which seemed to be what Alex was saying, too:
    "the errors will accumulate".  While in theory this 3' error is
    possible, I set out to show that in practice it is so unlikely as to
    present a negligible risk.
    
    I think the results speak for themselves: 86% within 1', 14% within 2'.
    
    As for the "well-established fact", if this indicates [0.5 x sqrt6 =
    1.22], then we may not need to argue about that, either - this may not
    be inconsistent with the results of the experiment.
    
    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site