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Calculate the Qexp of the outlying result in the data set: 8.33, 5.24, 5.74, 5.32, 5.8, 5.66, 5.34, 6.1
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- Indicate the normalized integration value for the hydrogen shown in bold. H H NO₂ H CI Ο 1Η O2H 3H 4H 5H O 6H HCalculate the 95% confidence interval for each set of data in Problem 2 if s is a good estimate of σ and has a value of *set A, 0.015; set B, 0.30 ; *set C, 0.070 ; set D, 0.20 ; *set E, 0.0090; and set F, 0.15.What inference you get when Qc = Kc?
- In the technique of high performance liquid chromatography (HPLC) the peak area response for a particular analyte is directly proportional to concentration Analgesic tablets typically consist of aspirin and caffeine as the active ingredients, the remainder made up of inert binding material. The concentrations of aspirin and caffeine may be routinely monitored using HPLC, whereby the peak areas obtained from a solution of the tablet are compared with those obtained from standard solutions of the analytes. In an analysis to determine the concentration of caffeine in such a tablet, the following data were recorded: Solutions Analysed: Tablet Sample: Mass of tablet (dissolved in 250 cm methano): 0.523 g Caffeine Standard: Mass of caffeine (diessolved in 500 cm methanol) 0.105 g HPLC results: Solution Peak Area (catfeine) 1. Tablet Sample 325 2. Caffeine Std. 865 The concentration of caffeine in the tablet (expressed as a mass (w/wl percentage) was Oa 1.89 Ob 13.4 O 3.77 Od. 267 Oe 7.54 You…B–3. An important continuous distribution is the exponential distribution p(x)dx = ce 0 a.Question: Using a method for the determination of % CaO in limestone the following results were obtained for a NIST Certified Reference Sample (CRM): % Cao 50.38, 50.20, 50.31, 50.22 50.41 Five samples were obtained from a railcar of limestone. The analysis of the samples gave the following results: % CaO 55.01, 59.61, 58.82, 64.39, 62.49 a) Determine the variance due to sampling. b) If the samples taken from the railcar had a mass of 0.500 g, what mass
- Why is it necessary for users to understand the principles behind statistical calculations in chemistry?In a survey of 1000 large corporations, 250 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job (USA Today).(a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p.(b) Find a 0.95 confidence interval for p.(c) As a news writer, how would you report the survey results regarding the proportion of corporations that hire the equally qualified nonsmoker? What is the margin of error based on a 95% confidence interval?The measurements were recorded and then repeated six times for two different methods, each giving: average of 42 (s = 0.3), and average of 45 (s = 0.2), respectively. Do these methods yield results that are significantly different?
