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- A method for the determination of the corticosteroid methylprednisolone acetate in solutions obtained from pharmaceutical preparations yielded a mean value of 3.7 mg mL with a standard deviation of 0.3 mg mL. For quality control purposes, the relative uncertainty in the concentration should be no more than 3%. How many samples of each batch should be analyzed to ensure that the relative standard deviation does not exceed 9% at the 95% confidence level? samplesHelp with standard deviationAn excess of 0.34 mg Pb is obtained from an assay test determined in an analysis. What is the percent relative error in ppt if the mass of the sample is 550 g?
- Using the following data set, calculate the average and the standard deviation to the correct number of significant figures and decimal places. 1.12%, 2.135%, 1.9855%, 1.33%, and 1.7544% 2. +0.43% 1.66 0.08 % O 1.66 0.4 % 1.7 +0.4 % O 1.66 0.43 %I am supposed to calculate Average absolute deviation (%). I am not sure if 7.16 is the final answer, or do i need to multiply by 100 because they are asking for percent?Importance of Standardization of NaOH
- Analyze each statement (A and B) whether they are true or false. Use the choices below in answering each item; A statement A is true B statement B is true C both A and B are true D neither A nor B are true (A) A dispersing agent such as Na-hexametaphosphate is needed prior to soil textural analysis. (B) particles greater than 2.0 mm is included in the analysis of soil texture.Arrange the values according to magnitude. Greatest Least Answer Bank 7.6 x 10-6 3.3 x 10-2 9.0 x 10-6 51000 1.5 x 105Analysis was run on samples from a known CRM with 8.85% Fe. The following results for %Fe were obtained by an analyst: 8.75, 8.51, 8.25, 8.61. Which of the following statements is true assuming none of the data points are outliers? Group of answer choices Tcalc = 63.15 The analysis is not accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is accurate at the 95% confidence interval. Not enough information to determine Tcalc = 63.15 The analysis is accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is not accurate at the 95% confidence interval.
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