The homogeneity of the chloride level in a water sample from a lake was tested b

Question

The homogeneity of the chloride level in a water sample from a lake was tested by analyzing portions drawn from the top and from near the bottom of the lake, with the following results in ppm CI: Apply the t test at the 95% confidence level to determine if the chloride level from the top of the lake is different from that at the bottom. (This problem requires values in your textbook's specific appendices, which you can access through the OWLv2 Mind Tap Reader. You should not use the OWLv2 References' Tables to answer this question as the values will not match.) Now use the paired t test and determine whether there is a significant difference between the top

Explanation / Answer

df = 8
  standard error of difference = 0.076

The mean of Group One minus Group Two equals 0.0840
  95% confidence interval of this difference: From -0.0909 to 0.2589
Since conf interval contains 0 and also since p value >0.05 accept null hypothesis that two means are equal.

  Group   Group One     Group Two   Mean 26.3380 26.2540 SD 0.1207 0.1191 SEM 0.0540 0.0533 N 5       5

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