Question

2. Determine the minimum number of samples to ensure that the total suspended solids (TSS)concentration is significantly below the regulatory threshold of 40 mg/L with 80% statistical power.Assume a significance

level of 0.05, a standard deviation of 3.2 mg/L, and a desired effect size of1 mg/L (use the Excel spreadsheet for Example 3.3). What is Cohen's d?

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