Cadmium
N
Mean
Std. Deviation
Std. Error Mean
241
0.1027
0.5000
0.0322
Test Value = 0.05
t = 1.637
df= 240
Sig. (2-tailed) =0.103
Mean Difference = 0.0527
95% Confidence Interval of the Difference
Chromium
N
Mean
Std. Deviation
Std. Error Mean
240
1.2110
5.4750
0.3534
Test Value = 0.05
t = 3.285
df =239
Sig.(2-tailed)= 0.001
Mean Difference = 1.1609
95% Confidence Interval of the Difference
Lead
N
Mean
Std. Deviation
Std. Error Mean
241
1.2764
7.9481
0.5119
Test Value = 0.05
t = 2.395
df= 240
Sig. (2-tailed)= 0.017
Mean Difference = 1.2264
95% Confidence Interval of the Difference
Arsenic
N
Mean
Std. Deviation
Std. Error Mean
241
0.1070
0.3273
0.0210
Test Value = 0.05
t = 2.708
df= 240
Sig. (2-tailed)= 0.007
Mean Difference = 0.0570
95% Confidence Interval of the Difference
Table 3:
One-sample statistics and test for cadmium, chromium, lead, and arsenic.
