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Tutor profile: Dani M.

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Dani M.
Senior Lab Specialist at University of Utah
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Questions

Subject: Environmental Science

TutorMe
Question:

What interactive components make up wildlife systems?

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Dani M.
Answer:

Wildlife systems are composed of biota, habitat, and humans

Subject: Basic Chemistry

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Question:

What is the molar mass of Al(CH3COO)3

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Dani M.
Answer:

204.1136 g/mol

Subject: Biology

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Question:

You have been given data from a fish study. The scientist measured the length of rainbow trout from 2 streams. In Blue Creek the phosphate levels are 52 ppm higher than in the Stanton Creek. Is there evidence that the levels of phosphate are affecting fish growth? What test is the appropriate test to use? If necessary, what are your hypotheses?

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Dani M.
Answer:

Appropriate Test: T-test (Comparison of Means) Blue Creek Stanton Creek Average Length 31.8 28.47 Stdev 13.86 9.31 Ho: Is there is no difference in the length of rainbow trout from the 2 sampled creeks Ha Is there is a difference in the length of rainbow trout from the 2 sampled creeks T-Test 0.8039206 T-Crit Val. 1.65 (90%) Statistical Decision I am not confident there is a difference Ecological Decision Phosphate levels of Blue Creek are higher (52ppm) than Stanton Creek. The average length of rainbow trout is longer in Blue Creek. However, the t-test shows that there is no significance in the length of the fish between these two creeks. There is no evidence that phosphate levels are effecting fish growth between these two creeks.

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