Toblem 3. Two water treatment reservoirs were examined to determine if there was a difference in productivity. Differences in productivity are measured by the presence of four types of micro-organisms. After four samples were taken at each

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Foblem 3. Two water treatment reservoirs were examined to determine if
there was a difference in productivity. Differences in productivity are measured by
the presence of four types of micro-organisms. After four samples were taken at each
1
IE 424 Process Quality Engineering
2022 Spring
reservoir, the following sample statistics were calculated. Assume data are normally
distributed.
Reservoir #1
Reservoir #2
Mean
Std Dev
Mean
Std Dev
Copepoda
Daphnia
|Mayfly
75.00
50.00
675.0
394.75
13.75
9.46
12.5
5.77
35.0
19.15
Volvox
17.5
9.52
a. Are there any differences in the Copepoda and Daphnia population at the 2
reservoirs at a significance level of a = 0.05?
b. Are there significant differences in Daphnia and Volvox at reservoir#2 at a
significance level of a = 0.05?
Transcribed Image Text:Foblem 3. Two water treatment reservoirs were examined to determine if there was a difference in productivity. Differences in productivity are measured by the presence of four types of micro-organisms. After four samples were taken at each 1 IE 424 Process Quality Engineering 2022 Spring reservoir, the following sample statistics were calculated. Assume data are normally distributed. Reservoir #1 Reservoir #2 Mean Std Dev Mean Std Dev Copepoda Daphnia |Mayfly 75.00 50.00 675.0 394.75 13.75 9.46 12.5 5.77 35.0 19.15 Volvox 17.5 9.52 a. Are there any differences in the Copepoda and Daphnia population at the 2 reservoirs at a significance level of a = 0.05? b. Are there significant differences in Daphnia and Volvox at reservoir#2 at a significance level of a = 0.05?
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