- 2 This Problem Concerns Applications To Dissolved Oxygen Concentration Levels In A Water Science Scenario It Is Essent 1 (169.83 KiB) Viewed 17 times
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2. This problem concerns applications to dissolved oxygen concentration levels in a water science scenario. It is essential to have a sufficient amount of dissolved oxygen in rivers for healty and sustainable aquatic life (for fish and other organisms). In particular, if its level drops below 5 mg/L especially in warm water, aquatic life is endangered. Consider a random sample of 120 measurements of oxygen concentration in a few locations of a river in California. The corresponding data set is in OxygenCon worksheet of the same Excel file. It is also in the Matlab file DataOxygen.mat. (a) Obtain both a histogram and a normality plot of the data. Does this data set appear to come from an approximate normal population? Why or why not? (b) Obtain the mean and standard deviation of the sample data to estimate the corresponding population mean and population standard deviation. Moreover, determine the standard error of sample mean (X) estimate.