PathMD Quizes, Clinical Statistics – 01 October 29, 2017 peferguson Make sure to subscribe to PathMD to stay up to date with new content and features!! 1. To validate a previously established reference range, what is the minimal number of healthy person samples needed?200As many as possible20180120 2. The coefficient of variation best represents which of the following:None of the answerBiasPrecisionEfficiencyAccuracy 3. A series of data for a new clinical lab test has a Gaussian distribution. What percent of the data will be more than 3 standard deviations above the mean?4.5%0.3%0.15%None of the answers2.25% 4. Of the following answers, which is the best tool to detect bias between two different methods?Bland-Altman plot F-test Linear regression analysis Gaussian distributions T-test 5. A new instrument is installed for CBCs, and a correlation test is performed. The reference method is plotted on the X-axis and the new method on the Y-axis for multiple samples tested. Linear regression analysis is performed (y=mx + b). Which of the following represents the correlation coefficient, r?Calculation of how well the points fit the line Line slope (m) None of the answersY-intercept (b) 6. Of the series of numbers { 1,3,3,3,4,5,5,7,8 }, calculate the mode, median, and mean, respectively.3,3,4.33 3,4,4.335,4,4.33 4,5,4.334,4,4.33 7. For a test with a Gaussian distribution, what is the minimum number of representative samples needed to determine a reference range?18020200As many as possible120 8. Which of the following correlation coefficients (r) represents the minimal number you would like to see when validating a new test?None of the answers0.30.990.970.9 9. If 20 tests were performed on a “healthy” individual, what is the likelihood all of the results will be within the reference range?46%60%95%None of the answers36% 10. For a test without a Gaussian distribution, what is the minimal number of representative samples needed to establish a reference range?12020180200As many as possible Loading...