Researchers investigated whether the malaria admission rate in a certain country is higher in some months than in others. in a sample of 156 hospital patients admitted in January, 30 were treated for malaria. In an independent sample of 439 patients admitted in May (4 months later), 35 were treated for malaria. Complete parts a through d below. '5} a. Describe the two populations of interest in this study. Choose the correct answer below. Patients with malaria and patients without malaria Number of admissions in January and number of admissions in May All May patients only V All January malaria patients and all May malaria patients b. Give a point estimate of the difference in the malaria admission rates in January and May. Let p1 be the proportion of patients admitted in January treated for malaria and let p2 be the proportion of patients admitted in May treated for malaria. A point estimate of the difference, (p1 p2) is D. (Round to two decimal places as needed.)