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One important aspect of medical diagnoses is it's free reproducibility. Suppose that two different doctors examine 100 patients for dyspnea in a respiratory disease clinic and Dr. a diagnosed 15 patients as having dyspnea, Dr. be diagnosed 10 patients is having dyspnea, and both Dr. a and Dr. be diagnosed seven patients is having dyspnea.
Question: Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
The average number of days absent per student per year at West Valley School is 17 days with a standard deviation of 4 days. How many standard deviations from the mean is 6 absent days?
A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is:
write down the hypothesis the test used the p-value and the interpretation then hand calculates a 95% CL for the odds ratio estimate on this last test.
Consumer Reports published an article on some sport-utility vehicles they had tested recently. They reported some basic information about each of the vehicles and the results of some tests conducted by their staff.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
The standard deviation of the differences d for the paired sample data s d = ____________
What is the probability that between 30 and 40 of the delinquents will commit another crime?
Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body tem of the population is less than 98.6
The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families,..
What is coefficient of determination? Calculate F statistic. (Hint: You must complete the table to answer the question.)
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
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