A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in pregnant mothers by conducting a retrospective case-control study on new moms. If the prevalence of anemia is approximately 39.7%, how many individuals should the researcher recruit to participate in the study if the researcher wants to be 95% confident that the margin of error is no more than 3.0%?
ntotal = 2044;n control group = 1,022;n case group = 1,022
ntotal = 2044;n control group = 812;n case group = 1,232
ntotal = 4088;n control group = 1,623;n case group = 2,465
ntotal = 4088;n control group = 2,044;n case group = 2,044
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