Read the following study, construct the appropriate 2x2 table, calculate the measure of association, state the study design, and state the interpretation of the results.A study was conducted to measure the association between radon and lung cancer in a Northeastern US city (population 15,000) which was found to have a high number of lung cancer cases. A total of 684 cases of lung cancer were found in the city. Radon testing was conducted on all the homes. Of 5,550 persons who had had homes that tested positive for radon, 478 developed lung cancer. The other 9,450 people in the city did not have radon found in their homes. 2x2 table   + - Total + A B A+B - C D C+D Total A+C B+D A+B+C+D   List the values for each cell: A, B, C, D, A+B, C+D, A+C, B+D, A+B+C+D Calculate the Risk Ratio (show your work) State your interpretation What type of study design is this?

A screening test for a disease is being evaluated against the current screening test (e.g., the gold standard test). The new test was administered to 3000 participants. Of those, 600 who had been previously diagnosed using the gold standard test were positive on the new screening test, and 200 who had been previously diagnosed using the gold standard test were negative on the new screening test. Also, 300 participants who were negative on the gold standard screening test were positive on the new test.  What is the positive predictive value of the new screening test, using the gold standard test as evidence of disease? A screening test for a disease is being evaluated against the current screening test (e.g., the gold standard test). The new test was administered to 3000 participants. Of those, 600 who had been previously diagnosed using the gold standard test were positive on the new screening test, and 200 who had been previously diagnosed using the gold standard test were…

Five different strains of E. coli (1, 2, 3, 4 and 5) were streaked onto a series of tester plates. After incubating the streaked plates for an appropriate amount of time, they were scored for growth (+) or no growth (-) of the various strains on each respective plate. MM denotes minimal medium, CM denotes complete medium and letters A, B and C denote the supplements added to minimal medium. Assume supplements A, B and C construct the complete bjochemical pathway. The results are shown below. Tester Plate Strain MM MM+ A MM + B MM+C CM 1 +. +1 +. +. 2. +. 4 Which supplement is most likely the end product? Select one: O a. B cross out O b. C cross out O c. A cross out +. 3.

Please answer this question. Describe a Normal vs. abnormal result of a DLCO test.