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                                    Describe the procedure to make the sample of the following: 10 1 Ektara | 
                            
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Answer»  Answer: a hospital based cross-sectional study, it is planned to estimate the mean D-dimer level AMONG COVID-19 patients. From previous LITERATURE, the standard deviation was found to be 200 ng/mL. If the RESEARCHERS WANT to estimate the mean with a 50 ng/mL precision and 95% significance level, what is the minimum sample size required?  | 
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