Lab 1

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• Published : February 3, 2013

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INSTRUCTIONS:
On your own and without assistance, complete this Lab 1 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus). •To conduct your laboratory exercises, use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be updated. •Save your Lab 1 Answer Form in the following format: LastName_Lab1 (e.g., Smith_Lab1). •You should submit your document in a Word (.doc or .docx) or Rich Text Format (.rtf) for best compatibility.

Exercise 1: Data Interpretation
Table 1: Water Quality vs. Fish Population
Dissolved Oxygen024681012141618
Number of Fish Observed01310121315101213

1.What patterns do you observe based on the information in Table 1? The dissolved Oxygen has a constant increasing rate of 2 ppm. While the number of fish observed does not have a precise pattern besides 10-13 were repeated twice in the whole table.

2.Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water. If the number of Dissolved oxygen increases then the number of fish observed increases as well.

3.What would your experimental approach be to test this hypothesis? To test the hypothesis you must first test out the increase in number of fish as it with the quantity of the dissolved oxygen. Also see if the experiment is repeatable and is accurate each time the experiment is conducted. 4.What are the independent and dependent variables?

The dependent variable is the number of fish observed. The independent variable is the dissolved oxygen.

The control could be the water temperature.
6.What type of graph would be appropriate for this data set? Why?

A bar graph would be appropriate for this data set because it shows the compares the relationship between the number of fish observed increasing or decreasing as the quantity of the dissolved oxygen constantly increases.

7.Graph the data from Table 1: Water Quality vs. Fish Population (found at the beginning of this exercise). You may use Excel, then “Insert” the graph, or use another drawing program. You may also draw it neatly by hand and scan your drawing. If you choose this option, you must insert the scanned jpg image here.

8.Interpret the data from the graph made in Question 7.

The Bar Graph shows the relationship between the numbers of fish observed in depending on the dissolved oxygen. The graph also shows a pattern that the number of fish observes increases at a constant rate at first then drops back down to 10 when the dissolved oxygen is at 14 ppm. This might have occurred due to some changes in temperature or if the experiment has been compromised resulting in a somewhat inaccurate result.

Exercise 2: Testable Observations

Determine which of the following observations (A-J) could lead to a testable hypothesis. For those that are testable:
Write a hypothesis and null hypothesis
What would be your experimental approach?
What are the dependent and independent variables?