9. (9 points) Assuming the below results were obtained in a study used to test the accuracy of the rapid diagnostic test for influenza, calculate and interpret the sensitivity and specificity of the rapid diagnostic influenza test. Frequency of Flu Cases Frequency of Non-Flu Cases Frequency of Individuals Who Screened Positive 47 10 Frequency of Individuals 43 100 Who Screened Negative a. Sensitivity: b. Specificity: C. What proportion of non-flu cases tested positive? 10. (9 points) A researcher has collected the blood samples of 30 individuals and found that the mean hemoglobin concentration for the sample of individuals is 13.9 grams per deciliter and the standard deviation is 1.43 grams per deciliter. a. In general terms, define what a confidence interval is. b. Using Table 6-1 from the textbook (also provided on the lecture slides) as a guide, identify the "number of samples", "outcome variable", and "parameter to be estimated" in this example. c. Calculate a 99.0% confidence interval for the mean hemoglobin concentration for the population. d. What is the margin of error for your calculated confidence interval? e. What would happen to the margin of error (i.e., does it increase or decrease?) if the following occur: 1) The sample size increases 2) The level of confidence decreases to 95%