Re: [R] Use of geometric mean for geochemical concentrations

2024-01-30 Thread Rich Shepard
On Tue, 30 Jan 2024, Leo Mada wrote: It depends how the data is generated. Although I am not an expert in ecology, I can explain it based on a biomedical example. Leo, My data are environmental, observational concentrations of water constituents. It's not only how data are generated, what

Re: [R] Use of geometric mean for geochemical concentrations

2024-01-30 Thread Leo Mada via R-help
Dear Rich, It depends how the data is generated. Although I am not an expert in ecology, I can explain it based on a biomedical example. Certain variables are generated geometrically (exponentially), e.g. MIC or Titer. MIC = Minimum Inhibitory Concentration for bacterial resistance Titer =

Re: [R] Use of geometric mean for geochemical concentrations [RESOLVED]

2024-01-24 Thread Rich Shepard
On Mon, 22 Jan 2024, Rich Shepard wrote: As an aquatic ecologist I see regulators apply the geometric mean to geochemical concentrations rather than using the arithmetic mean. I want to know whether the geometric mean of a set of chemical concentrations (e.g., in mg/L) is an appropriate

Re: [R] Use of geometric mean for geochemical concentrations

2024-01-22 Thread Rich Shepard
On Mon, 22 Jan 2024, Ben Bolker wrote: I think https://stats.stackexchange.com would be best: r-sig-ecology is pretty quiet these days Okay, Ben. Thanks, Rich __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see

Re: [R] Use of geometric mean for geochemical concentrations

2024-01-22 Thread Ben Bolker
I think https://stats.stackexchange.com would be best: r-sig-ecology is pretty quiet these days On 2024-01-22 11:05 a.m., Rich Shepard wrote: On Mon, 22 Jan 2024, Bert Gunter wrote: better posted on r-sig-ecology? -- or maybe even stack exchange? Bert, Okay. Regards, Rich

Re: [R] Use of geometric mean for geochemical concentrations

2024-01-22 Thread Rich Shepard
On Mon, 22 Jan 2024, Bert Gunter wrote: better posted on r-sig-ecology? -- or maybe even stack exchange? Bert, Okay. Regards, Rich __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help

Re: [R] Use of geometric mean for geochemical concentrations

2024-01-22 Thread Bert Gunter
better posted on r-sig-ecology? -- or maybe even stack exchange? Cheers, Bert On Mon, Jan 22, 2024 at 7:45 AM Rich Shepard wrote: > A statistical question, not specific to R. > > I'm asking for a pointer for a source of definitive descriptions of what > types of data are best summarized by the

[R] Use of geometric mean for geochemical concentrations

2024-01-22 Thread Rich Shepard
A statistical question, not specific to R. I'm asking for a pointer for a source of definitive descriptions of what types of data are best summarized by the arithmetic, geometric, and harmonic means. As an aquatic ecologist I see regulators apply the geometric mean to geochemical concentrations