Re: [chrony-users] question about the values in critical

Re: [chrony-users] question about the values in critical_runs array

[ Thread Index | Date Index | More chrony.tuxfamily.org/chrony-users Archives ]

To: "chrony-users@xxxxxxxxxxxxxxxxxxxx" <chrony-users@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [chrony-users] question about the values in critical_runs array
From: 邹林志08963 <ZouLinZhi8963@xxxxxxxxxxx>
Date: Tue, 25 Jun 2024 09:38:09 +0000
Accept-language: zh-CN, en-001, en-US
Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=navinfo.com; dmarc=pass action=none header.from=navinfo.com; dkim=pass header.d=navinfo.com; arc=none
Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=QJ4EQkcdiSguuk2g+OL+6XFCmFz9BszfppHSmE2E1Q8=; b=Bmrk9YMb7AZ5bwPlpsb4Sh6qjKe2ZvA4Qq3Dw/ztb1YNF8q31h29stbj3V/OFDISKB0opC5QrVU/EGmdgUWPSTzQkkcvWqj3jhwadLCVrDwgLnJONrlZ+WfknOOq8scNwQrFD3b2b/k+O+NuSs3Rby7NqexGDUt0hGcbvV7UMQfEqKCGGWBZt1O0FflnZ8IOPaUbwd+Xcu8GxvAywQj7jyKCAhkPbyOTj5XXIO/LOzsU/mYq2AgwJtrJkw/ZVIbNVMTQ2FBXkBAp/DiDCRJ/3D6NXHn0XpDux0trvbDL08kWmunIBRL/n6RHxnqTKY4vLNFAZRf7rX1D5FxigDWoQw==
Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=gGC4GpbdcSW/kphzW89FsCWfoz/6FRsbJUUrtGXM5oknE/LYHzuxU5uqBr4IqjTek6CR3dhUCCZjjnUHHij7LH5nvucO/FSl/1Z3Q+ZCt7r1tFRH/eKwVb4/E+TIAlTPq38zFTO7kGM7u3II1Ny2f6fn2ebC75ZQ87EO6tytE9bVmhOF+9Jj1+5o5hK0rotU9EMr7kIMqIMUDAv0D0BvxuymHzv8ANKJuuuJuLI6iskZ2mKOR/bqVZok6VG1ZzNJmLsvvsn6PbL30KG3keuTHYZfFduNbjIjbF27AV8K8eKAmUQ+ydgwF99NULFYgUCgrXKBXN3p2lBoAwc5f0UeUw==
Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=navinfo.com;
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=navinfo2.partner.onmschina.cn; s=selector1-navinfo2-partner-onmschina-cn; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=QJ4EQkcdiSguuk2g+OL+6XFCmFz9BszfppHSmE2E1Q8=; b=I2QKwwmwqU1pt6t3u1/kPtWs+cSYxm9PZ1nW2lJVVYfhJz9sNOTT4bAULtbcbM3RsEoSrwBsr+g5iLAUc1y6auBzsgNyI+t0vpQWjRXP0ODtkZ2LtXTUz4qVMD0m1oR77+VsnLeZAz1cRvo71yuwUipzZdZl7ieFkbw3p3aEpQw=
Msip_labels:
Thread-index: AQHaxqF08DJL3gu5qESEndXOzWmkS7HYJ/iAgAAOI50=
Thread-topic: [chrony-users] question about the values in critical_runs array

> > where are the values in array critical_runs come from ?

> > for example, when there are total 50 sample points, if the total runs value is larger than 19, then the value of a and b is reliable.

> >

> > the comment is "Critical value for number of runs of residuals with same sign. 5% critical region for now."

> > what is the formula or method to get the runs value of 19 for 50 samples?

> It's the Wald-Wolfowitz runs test with the assumption that n1==n2.

> The table is calculated like this:

> - for i < 8 it's 0

> - for i >= 8 it's mu - sqrt(var) * z where:

> mu = 2.0 * (i / 2.0) * (i / 2.0) / i + 1.0

> var = (mu - 1.0) * (mu - 2.0) / (i - 1)

> z = 1.65

I examed this formula with i up to 129, and the result is same with critical_runs array !

thanks very much!

References:
- [chrony-users] question about the values in critical_runs array
  - From: 邹林志08963
- Re: [chrony-users] question about the values in critical_runs array
  - From: Miroslav Lichvar

Messages sorted by: [ date | thread ]
Prev by Date: Re: [chrony-users] question about the values in critical_runs array
Next by Date: [chrony-users] Seeing full FQDN in chronyc output
Previous by thread: Re: [chrony-users] question about the values in critical_runs array
Next by thread: [chrony-users] Seeing full FQDN in chronyc output

Mail converted by MHonArc 2.6.19+

http://listengine.tuxfamily.org/