A verification study was performed and a standard with a known value of 10 was performed on a new analyzer. The new analyzer produced a value of 13. What would the accuracy be for this standard?
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A verification study was performed and a standard with a known value of 10 was performed on a new analyzer. The new analyzer produced a value of 13. What would the accuracy be for this standard?
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- A survey was conducted to research the public's views on potholes. When the results were analyzed, researchers found that 65% of adults age 20 to 40 view potholes as a serious problem, but only 47% of adults age 60 and older view potholes as a serious problem. Researchers are interested in the difference in proportions of adults age 60 and over and adults age 20 to 30. The standard error for the difference in proportions is 0.011. Which of the following is the margin of error for a 95% confidence interval? Group of answer choices 0.021 0.028 0.011 0.018A study was carried out to determine the influence of a trace elementfound in soil on the yield of potato plants grown in that soil, defined asthe weight of potatoes produced at the end of the season. A large fieldwas divided up into 14 smaller sections for this experiment. For eachsection, the experimenter recorded the amount of the trace elementfound (in milligrams per metre squared) and the corresponding weightof the potatoes produced (in kilograms). This information is presentedin the worksheet ‘Dataset5’ in the Excel document. Define X as thetrace element amount and Y as the yield.1. Draw a scatterplot of your data set.Page 52. Calculate the coefficients of a linear equation to predict the yieldY as a function of X.3. Calculate the correlation coefficient for the paired data values.4. Set up the framework for an appropriate statistical test to establish if there is a correlation between the amount of the trace element and the yield. Explain how having the scatterplot referredto…In a study at The Ohio State University, 16 student volunteers drank a randomly assigned number of cans of beer. Thirty minutes later, a police officer measured their blood alcohol content (BAC) in grams of alcohol per deciliter of blood. Throughout the United States, the legal BAC limit is 0.08. The students were equally divided between men and women and differed in weight and usual drinking habits. Because of this variation, many students do not believe that the number of ingested drinks predicts BAC well.The data in the given figure consists of: a.2 unpaired sets of values, each of which has 16 values b.32 ordered pairs of values c.16 ordered pairs of values
- What is the PMT?The National Institute of Standards and Technology (NIST) offers a wide variety of “standard reference materials” (SRMs) with accurately specified analyte concentrations. SRM 1951c is intended in part for “evaluating the accuracy of clinical procedures for the determination of total cholesterol . . . in human serum.” The certified total cholesterol is 6.244 ± 0.072 mmol/L. For the sake of this question, let’s treat 6.244 mmol/L as its “true” value (μ). We will use this standard to test a method with an intrinsic variability (for an experienced analyst) of σ = 0.131 mmol/L. 1. For what value of z does exactly 95% of the area under a Gaussian curve lie between ± z? Use this multiplier to find the range of measured cholesterol concentrations that would include 95% of the trials from the “parent population” (μ and σ) given above. 2. Calculate z for a trial in which the measured total cholesterol concentration is 6.302 mmol/L. 3. What is the probability that a trial will give a cholesterol…The National Institute of Standards and Technology (NIST) offers a wide variety of “standard reference materials” (SRMs) with accurately specified analyte concentrations. SRM 1951c is intended in part for “evaluating the accuracy of clinical procedures for the determination of total cholesterol . . . in human serum.” The certified total cholesterol is 6.244 ± 0.072 mmol/L. For the sake of this question, let’s treat 6.244 mmol/L as its “true” value (μ). We will use this standard to test a method with an intrinsic variability (for an experienced analyst) of σ = 0.131 mmol/L. **Please show written work! It is difficult to understand "text" work/answers with mathematical/statistical problems** 1. For what value of z does exactly 95% of the area under a Gaussian curve lie between ± z? Use this multiplier to find the range of measured cholesterol concentrations that would include 95% of the trials from the “parent population” (μ and σ) given above. 2. Calculate z for a trial in which the…
- The National Institute of Standards and Technology (NIST) offers a wide variety of “standard reference materials” (SRMs) with accurately specified analyte concentrations. SRM 1951c is intended in part for “evaluating the accuracy of clinical procedures for the determination of total cholesterol . . . in human serum.” The certified total cholesterol is 6.244 ± 0.072 mmol/L. For the sake of this question, let’s treat 6.244 mmol/L as its “true” value (μ). We will use this standard to test a method with an intrinsic variability (for an experienced analyst) of σ = 0.131 mmol/L. In three trials, you obtained the following cholesterol concentrations (all in mmol/L): 6.476, 6.590, 6.338. 1. Showing all work, calculate a 95% confidence interval for your measured cholesterol concentration and write it as an intermediate result (with guard digits). Does your measurement differ from μ at 95% confidence? 2. Repeat part 1 for 90% confidence and explain any change in your conclusion. 3. Another…In a Ni-Cd battery, a fully charged cell is composed of nickelic hydroxide. Nickel is an element that has multiple oxidation states. Assume the following proportions of the states: Nickel Charge Proportions Found 0 0.17 +2 0.34 +3 0.33 +4 0.5-0.34 Determine the mean of the nickel charge. Please enter the answer to 2 decimal places.While the world focuses on Covid-19, scientists are working hard to ensure that the Nipah virus doesn't cause the next pandemic. The death rate for Nipah virus is 50.0% . Suppose, 17 patients reportedly infected of this deadly virus are admitted to the central hospital after an outbreak. a. What is the mean number of patients who'll eventually die of the disease? Answer in exact fraction, or rounded to at least 2 decimal places. b. What is the standard deviation in the number of patients who'll die of Nipah infection? Answer in exact fraction, or rounded to at least 2 decimal places. c. What is the probability that the number of death is more than 2 standard deviations away from the mean value? Answer in exact fraction, or rounded to at least 4 decimal places.
- A random sample of 12 song lengths (in minutes) on a playlist found: = 278.3, s = 19. Build a 80% CI for the population mean length of a song on the playlist. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. a. Since n < 30, We use a Z-interval O We use s, not o O It is important that song lengths be normally distributed O We use a T-interval b. The Cl is: Submit QuestionHigh cholesterol is one of the major risk factors for heart disease. A total cholesterol reading above 190 mg/dL is considered high.A physician is concerned that a patient may be at risk for high cholesterol. In order to accurately measure the patient's average cholesterol level, the physician instructs the patient to come into the physician's office once a week for 12 weeks for a blood lipid screening. The results of the 12 measurements are listed below. 189 186 199 197 190 186 185 200 200 200 185 190 Use the critical value method to test the hypothesis that the patient's cholesterol level is greater than 190 mg/dL, using a significance level of 10%. Assume that the distribution of all cholesterol measurements from this patient is approximately normally distributed. Determine the critical value(s) for this hypothesis test. Round the solution(s) to four decimal places. If more than one critical value exists, enter the solutions using a comma-separated list.Determine the test…Number 1