Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration in bottom water and surface water. The raw data provided in table below. Does the data suggest that the true average concentration in the bottom water exceeds that of surface water? Use ?=0.01.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration in bottom water and surface water. The raw data provided in table below. Does the data suggest that the true average concentration in the bottom water exceeds that of surface water? Use ?=0.01.

 

 

 

 

 

 

Location
1 2 3
Zinc (bottomZ)
concentration in .430 .266 567 .531 .707 .716 .651 .589 469 .723
bottom water
Variable
bottomz
surfacez 10
4 5 6 7 8 9 10
Zinc (surfaceZ)
concentration in .415 .238 .390 .410 .605 .609 .632 523 411 612
surface water
diff
diff2
Hint, please feel free to use the summary statistics I computed for you
N
Sum
10 5.6490
4.8450
10 0.8040
10
0.0892
Mean
0.5649
0.4845
0.0804
8.923E-03
Minimum
0.2660
0.2380
0.0150
2.250E-04
Maximum
0.7230
0.6320
0.1770
0.0313
Transcribed Image Text:Location 1 2 3 Zinc (bottomZ) concentration in .430 .266 567 .531 .707 .716 .651 .589 469 .723 bottom water Variable bottomz surfacez 10 4 5 6 7 8 9 10 Zinc (surfaceZ) concentration in .415 .238 .390 .410 .605 .609 .632 523 411 612 surface water diff diff2 Hint, please feel free to use the summary statistics I computed for you N Sum 10 5.6490 4.8450 10 0.8040 10 0.0892 Mean 0.5649 0.4845 0.0804 8.923E-03 Minimum 0.2660 0.2380 0.0150 2.250E-04 Maximum 0.7230 0.6320 0.1770 0.0313
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