4. A national survey of AIDS risk factors based on a random sample of 2673 heterosexual adults found the ITU individuals reported two or more sexual partners in the past 12 months. (Assume the responses are truthful.) (A) Describe the population to which inferences will be made. Describe the parameter to be estimated. (B) Calculate the point estimate for the prevalence of this risk factor. (C) What is the parameter of interest? Can the large sample method be used to calculate condence intervals for the prevalence of this risk factor? (D) Calculate a 95% CI for the prevalence of multiple sexual partners in this population. (E) Calculate a 90% CI for the prevalence