Interpreting trend using parallel boxplot

Olanike — Fri, 27 Oct 2017 15:24:40 GMT

Hi All,

I am using proc box plot to determine a trend in a multi-yr nutrients' study. I have attached the results of the parallel box plot across the years.

Please how do I interprete these two figures (viz-a-viz the trend across the years).

Thanks.

Re: Interpreting trend using parallel boxplot

Reeza — Fri, 27 Oct 2017 00:04:13 GMT

Box plots show:

Distribution, measures of centres and outliers. So pick each of those metrics and compare them over the years.

How has the distribution changed over the years? Did it get more variable? Or did it get less variable? Did it change at a consistent rate or did it vary, i.e. get high then low.

Then rinse and repeat for each of your metrics.

Hope that helps you get started.

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Interpreting trend using parallel boxplot

Re: Interpreting trend using parallel boxplot