Phosphorous is a chemical that is found in many household cleaning products. Unfortunately, phosphorous also finds its way into surface water, where it can harm fish, reduction (mg/L) was recorded. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. Site Method I: Method II: 4 0.007 0.017 0.013 0.020 0.015 0.017 0.002 0.001 0.010 0.013 0.039 0.014 Do these data indicate a difference (either way) in the average reduction of phosphorous between the two methods? Use a 0.05. (Let d = Method I - Method II.)

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(i) What is the level of significance? 

What is the value of the sample test statistic? (Round your answer to three decimal places.)

Phosphorous is a chemical that is found in many household cleaning products. Unfortunately, phosphorous also finds its way into surface water, where it can harm fish,
reduction (mg/L) was recorded. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may
increase the P-value a small amount and thereby produce a slightly more "conservative" answer.
Site
Method I:
Method II:
4
0.007
0.017
0.013
0.020
0.015
0.017
0.002
0.001
0.010
0.013
0.039
0.014
Do these data indicate a difference (either way) in the average reduction of phosphorous between the two methods? Use a 0.05. (Let d = Method I - Method II.)
Transcribed Image Text:Phosphorous is a chemical that is found in many household cleaning products. Unfortunately, phosphorous also finds its way into surface water, where it can harm fish, reduction (mg/L) was recorded. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. Site Method I: Method II: 4 0.007 0.017 0.013 0.020 0.015 0.017 0.002 0.001 0.010 0.013 0.039 0.014 Do these data indicate a difference (either way) in the average reduction of phosphorous between the two methods? Use a 0.05. (Let d = Method I - Method II.)
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