# Lab 1 Data Interpretation

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Lab 1 - Exercise 1: Data Interpretation Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organism requires oxygen to survive, it is a necessary component of water systems such as streams, lakes and rivers in order to support aquatic life. The dissolved oxygen is measured in units of parts per million (ppm). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally, answer the questions below. Questions 1. What patterns do you observe based on the information in Table 4? 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? 3. What would your experimental approach be to test this hypothesis? 4. What would be the independent and dependent variables? 5. What would be your control? 6. What type of graph would be appropriate for this data set? Why? 7. Graph the data from Table 4: Water Quality vs. Fish Population (found at the beginning of this exercise). Describe what your graph looks like (you do not have to submit a picture of the actual graph!!). 8. Interpret the data from the graph made in Question 7. Lab 1 - Exercise 2: Percentage Error In the questions below, determine the percentage error. Show your work on all problems. 1. A dad holds five coins in his hand. He tells his son that if he can guess the amount of money he is holding within 5% error he can have the money. The son guesses that he is holding 81 cents. The dad opens his hand and displays 90 cents. Did the son guess close enough to receive the money from his father? 2. A science teacher tells