3f5b3cdd98
* feat: add configurable SMTP HELO hostname Allow the SMTP HELO/EHLO hostname to be configured separately from the SMTP server hostname. This is useful when the SMTP server requires clients to identify themselves with a fully qualified hostname different from the server address. * chore: remove vendored dependency changes * Bump go-pkgz/notify to v1.4.0 and document SMTP_HELO_HOST The HELOHost field lands in go-pkgz/notify v1.4.0, so the branch needs the bump to compile; v1.3.0 in master has no such field. The example module is tidied alongside, as any change to backend/go.mod requires. Documents the parameter in the parameters table and, separately, in the email setup page: what it does, that leaving it unset keeps the previous `localhost` greeting, and the case it exists for, a relay refusing the greeting under Postfix `reject_non_fqdn_helo_hostname`. Also records the current limit: verification emails for email authentication go through go-pkgz/auth's own sender, which has no equivalent setting, so the greeting there is unchanged. * Bump go-pkgz/auth to v2.2.0 and apply SMTP_HELO_HOST to verification email The verification email sender had no way to set the greeting, so a relay that refuses the HELO would accept notifications and still reject sign-in emails. EmailParams gains HELOHost in go-pkgz/auth v2.2.0, so the same SMTP_HELO_HOST now drives both paths. The example module is tidied alongside, as any change to backend/go.mod requires. --------- Co-authored-by: oli <someone@somewhere.tld> Co-authored-by: Dmitry Verkhoturov <paskal.07@gmail.com>
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package stats
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import "math"
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// ZTest performs a one-sample or two-sample Z-test.
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//
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// For a one-sample Z-test, pass the sample data as data1, nil for data2,
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// the known population mean as populationMean, and the known population
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// standard deviation as populationStdDev.
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//
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// For a two-sample Z-test, pass both sample datasets and the known population
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// standard deviations. The populationMean parameter is ignored in this case.
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//
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// Returns the Z statistic and the two-tailed p-value.
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//
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// https://en.wikipedia.org/wiki/Z-test
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func ZTest(data1, data2 Float64Data, populationMean, populationStdDev float64) (z float64, pvalue float64, err error) {
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n1 := data1.Len()
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if n1 == 0 {
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return math.NaN(), math.NaN(), ErrEmptyInput
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}
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mean1, _ := Mean(data1)
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// Two-sample Z-test
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if data2 != nil && data2.Len() > 0 {
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n2 := data2.Len()
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mean2, _ := Mean(data2)
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if populationStdDev <= 0 {
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return math.NaN(), math.NaN(), ErrBounds
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}
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se := populationStdDev * math.Sqrt(1.0/float64(n1)+1.0/float64(n2))
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z = (mean1 - mean2) / se
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} else {
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// One-sample Z-test
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if populationStdDev <= 0 {
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return math.NaN(), math.NaN(), ErrBounds
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}
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se := populationStdDev / math.Sqrt(float64(n1))
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z = (mean1 - populationMean) / se
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}
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pvalue = 2 * NormSf(math.Abs(z), 0, 1)
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return z, pvalue, nil
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}
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