Researchers studied the diversity of macroscopic invertebrat…
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Reseаrchers studied the diversity оf mаcrоscоpic invertebrаtes in different areas of watershed ecosystems. They collected samples from 58 sites along 11 streams in the same geographical area. Their data were classified by stream type and can be found in Figure 1. The stream-type classifications range from the perennial stream type, which always has water, to the intermittent stream type, which is dry for more than nine months during the year. The horizontal axis is labeled Stream Type, and the 4 bars indicated along it are labeled Perennial, Transitional, Seasonal, and Intermittent respectively. An error range is given for each bar. The vertical axis is labeled Simpson’s Diversity Index, and the numbers 0 through 0.45, in increments of 0.05, are indicated. Each bar is described as follows. Note that all values are approximate. Perennial. 0.40, plus or minus 0.02. Transitional. 0.34, plus or minus 0.5. Seasonal. 0.39, plus or minus 0.2. Intermittent. 0.32, plus or minus 0.4. Figure 1. Diversity of macroscopic invertebrates in different stream types. Error bars represent a 95% confidence interval (±two Standard Errors from the mean). Which of the stream types had a statistically lower macroscopic invertebrate species diversity than the seasonal streams?
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Which аlgоrithm is cоmmоnly used for clustering?
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