The line plot shows the ages of the children who had their photographs taken at a photography studio during a certain week. Which statement is true about the graph of the children who had their photographs taken?

A. The graph has an outlier at 1.
B. The data in the graph is symmetrical in shape.
C. The graph has a peak at 10.
D. The graph has a cluster of data.

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)