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. If 20 tests were performed on a “healthy” individual, what is the likelihood all of the results will be within the reference range?60%36%95%46%None of the answers 2. Which of the following correlation coefficients (r) represents the minimal number you would like to see when validating a new test?0.990.90.97None of the answers0.3 3. For a test without a Gaussian distribution, what is the minimal number of representative samples needed to establish a reference range?As many as possible12018020020 4. The coefficient of variation best represents which of the following:None of the answerPrecisionBiasAccuracyEfficiency 5. 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%None of the answers2.25%0.3%0.15% 6. For a test with a Gaussian distribution, what is the minimum number of representative samples needed to determine a reference range?As many as possible20200180120 7. 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?Y-intercept (b) Line slope (m) None of the answersCalculation of how well the points fit the line 8. Of the following answers, which is the best tool to detect bias between two different methods?Linear regression analysis Gaussian distributions Bland-Altman plot T-test F-test 9. Of the series of numbers { 1,3,3,3,4,5,5,7,8 }, calculate the mode, median, and mean, respectively.4,5,4.333,3,4.33 3,4,4.334,4,4.33 5,4,4.33 10. To validate a previously established reference range, what is the minimal number of healthy person samples needed?20020180120As many as possible Loading...