{
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  "Package": "MGBT",
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  "Title": "Multiple Grubbs-Beck Low-Outlier Test",
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  "Date": "2026-05-21",
  "Authors@R": "c(person(c(\"William\", \"H.\"), \"Asquith\",\nrole = c(\"aut\", \"cre\"),\nemail = \"wasquith@usgs.gov\",\ncomment = c(ORCID = \"0000-0002-7400-1861\")),\nperson(c(\"John\", \"F.\"), \"England\",\nrole = c(\"aut\", \"ctb\"),\ncomment = c(ORCID = \"0000-0001-5563-6274\")),\nperson(c(\"George\", \"R.\"),\"Herrmann\",\nrole = \"ctb\",\ncomment = c(ORCID = \"0000-0003-3829-5580\")))",
  "Description": "Compute the multiple Grubbs-Beck low-outlier test on\npositively distributed data and utilities for noninterpretive\nU.S. Geological Survey annual peak-streamflow data processing\ndiscussed in Cohn et al. (2013) and England et al. (2017)\n<doi:10.3133/tm4B5>. Other utilities for working with peak\nstreamflow are provided.",
  "Maintainer": "William H. Asquith <wasquith@usgs.gov>",
  "License": "CC0",
  "Copyright": "This software is in the public domain because it contains\nmaterials that originally came from the United States\nGeological Survey, an agency of the United States Department of\nInterior. For more information, see the official USGS copyright\npolicy at\nhttps://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits",
  "NeedsCompilation": "no",
  "URL": "https://doi.org/10.5066/P9CW9EF0",
  "Packaged": {
    "Date": "2026-05-27 11:10:08 UTC",
    "User": "root"
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  "Author": "William H. Asquith [aut, cre] (ORCID:\n<https://orcid.org/0000-0002-7400-1861>), John F. England [aut,\nctb] (ORCID: <https://orcid.org/0000-0001-5563-6274>), George\nR. Herrmann [ctb] (ORCID:\n<https://orcid.org/0000-0003-3829-5580>)",
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    "BLlo",
    "CondMomsChi2",
    "CondMomsZ",
    "CritK",
    "critK10",
    "EMS",
    "GGBK",
    "gtmoms",
    "jointPeaks",
    "makeWaterYear",
    "MGBT",
    "MGBT17c",
    "MGBT17c.verb",
    "MGBTcohn2011",
    "MGBTcohn2013",
    "MGBTcohn2016",
    "MGBTnb",
    "peakTMtoHRS",
    "peta",
    "plotFFQevol",
    "plotPeaks",
    "plotPeaks_batch",
    "ratioPeakMax1Day",
    "readNWISwatstore",
    "RSlo",
    "RthOrderPValueOrthoT",
    "splitPeakCodes",
    "V",
    "VMS"
  ],
  "_help": [
    {
      "page": "MGBT-package",
      "title": "Multiple Grubbs-Beck Low-Outlier Test",
      "topics": [
        "MGBT-package"
      ]
    },
    {
      "page": "ASlo",
      "title": "Regression of a Heuristic Method for Identification of Low Outliers in Texas Annual Peak Streamflow",
      "topics": [
        "ASlo"
      ]
    },
    {
      "page": "BLlo",
      "title": "Barnett and Lewis Test Adjusted for Low Outliers",
      "topics": [
        "BLlo"
      ]
    },
    {
      "page": "CondMomsChi2",
      "title": "Conditional Moments: N.B. Moments employ only observations above Xsi",
      "topics": [
        "CondMomsChi2"
      ]
    },
    {
      "page": "CondMomsZ",
      "title": "Conditional Moments: N.B. Moments employ only observations above Xsi",
      "topics": [
        "CondMomsZ"
      ]
    },
    {
      "page": "CritK",
      "title": "Compute Critical Value of Grubbs-Beck statistic (eta) Given Probability",
      "topics": [
        "CritK"
      ]
    },
    {
      "page": "critK10",
      "title": "Single Grubbs-Beck Critical Values for 10-percent Test as used in Bulletin 17B",
      "topics": [
        "critK10"
      ]
    },
    {
      "page": "EMS",
      "title": "Expected values of M and S",
      "topics": [
        "EMS"
      ]
    },
    {
      "page": "GGBK",
      "title": "Cohn Approximation for New Generalized Grubbs-Beck Critical Values for 10-Percent Test",
      "topics": [
        "GGBK"
      ]
    },
    {
      "page": "gtmoms",
      "title": "Moments of Observations Above the Threshold",
      "topics": [
        "gtmoms"
      ]
    },
    {
      "page": "jointPeaks",
      "title": "Construct Joint Peak Object and Empirical Probabilities",
      "topics": [
        "jointPeaks"
      ]
    },
    {
      "page": "makeWaterYear",
      "title": "Make Water Year Column",
      "topics": [
        "makeWaterYear"
      ]
    },
    {
      "page": "MGBT",
      "title": "Multiple Grubbs-Beck Test (MGBT) for Low Outliers",
      "topics": [
        "MGBT",
        "MGBT17c",
        "MGBT17c.verb",
        "MGBTcohn2011",
        "MGBTcohn2013",
        "MGBTcohn2016",
        "MGBTnb"
      ]
    },
    {
      "page": "peakTMtoHRS",
      "title": "Peak Time to Decimal Hours or Compute Mean and Standard Deviations",
      "topics": [
        "peakTMtoHRS"
      ]
    },
    {
      "page": "peta",
      "title": "Probability of Eta",
      "topics": [
        "peta"
      ]
    },
    {
      "page": "plotFFQevol",
      "title": "Plot Flood-Frequency in Time",
      "topics": [
        "plotFFQevol"
      ]
    },
    {
      "page": "plotPeaks",
      "title": "Plot Peak Streamflows with Emphasis on Peak Discharge Qualification Codes",
      "topics": [
        "plotPeaks"
      ]
    },
    {
      "page": "plotPeaks_batch",
      "title": "Plot for More than One Streamgage that Peak Streamflows with Emphasis on Peak Discharge Qualification Codes",
      "topics": [
        "plotPeaks_batch"
      ]
    },
    {
      "page": "ratioPeakMax1Day",
      "title": "Relations Between Peak Streamflows to 1-Day Annual Maxima",
      "topics": [
        "ratioPeakMax1Day"
      ]
    },
    {
      "page": "readNWISwatstore",
      "title": "Read NWIS WATSTORE-Formatted Period of Record Peak Streamflows and Other Germane Operations",
      "topics": [
        "readNWISwatstore"
      ]
    },
    {
      "page": "RSlo",
      "title": "Rosner RST Test Adjusted for Low Outliers",
      "topics": [
        "RSlo"
      ]
    },
    {
      "page": "RthOrderPValueOrthoT",
      "title": "P-value for the Rth Order Statistic",
      "topics": [
        "RthOrderPValueOrthoT"
      ]
    },
    {
      "page": "splitPeakCodes",
      "title": "Split the Peak Discharge Qualifications Codes into Separate Columns",
      "topics": [
        "splitPeakCodes"
      ]
    },
    {
      "page": "V",
      "title": "Covariance matrix of M and S-squared",
      "topics": [
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      ]
    },
    {
      "page": "VMS",
      "title": "Covariance matrix of M and S",
      "topics": [
        "VMS"
      ]
    }
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