Samples of size n = 125 are randomly selected from the u. s. census data, and the median children per household is found for each sample. what is the distribution of the sample medians? not enough information providedskewed to the leftskewed to the rightnormal (approximately)

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)