Let X be a discrete random variable with the following PMF (0.1 for x = 0.2 for x = 0.4 0.2 for x = 0.7 | 0.3 for x = 0.8 0.2 for x = 1 0.2 Px(x) = otherwise a. Find P(X < 0.7) b. Find P(0.25
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- Estimate sensitivity, specificity, positive predictive value, negative predictive value and prevalence from data in the 2 x 2 table for an infectious disease and its diagnostic test.Question: a) How many variable are in the data set? b) Identify the qualitative and quantitative variables.Applying the Concepts and Skills Graduation Rates. Graduation rate—the percentage of entering freshmen attending full time and graduating within 5 years— and what influences it is a concern in U.S. colleges and universities. U.S. News and World Report ’s “College Guide” provides data on graduation rates for colleges and universities as a function of the percentage of freshmen in the top 10% of their high school class, total spending per student, and student-to-faculty ratio. A random sample of 10 universities gave the following data on student-to-faculty ratio (S/F ratio) and graduation rate (Grad rate). S/F ratio Grad rate S/F ratio Grad rate x y x y 16 45 17 46 20 55 17 50 27 70 17 66 19 50 10 26 22 47 18 60 a. Draw a scatterplot of the data. b. Is finding a regression line for the data reasonable? Explain your answer. c. Determine the regression equation for the data, and draw its graph on the scatterplot you drew in part (a). d. Describe the apparent…
- a Research question population and variablesEnd Daylight Savings Keep Daylight Savings Parent 30 10 40 Given the cross-tab above; the dependent variable is is a parent; end daylight savings views on daylight savings; parental status parental status; views on daylight savings keep daylight savings; not a parent Not a Parent 20 40 60 50 50 N=100 and the independent variable isSolve question (a) please
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