A study dealing with health care issues plans to take a sample survey of 1500 Americans to estimate the proportion who have health insurance and the mean dollar amount that Americans spent on health care this past year. a. Identify the population parameters that this study will estimate. b. Identify the statistics that can be used to estimate these parameters. a. Identify two population parameters that this study will estimate. A. The sample proportion who have health insurance OB. The population mean dollar amount spent on health care this past year O C. The number of people who have health insurance D. The population proportion who have health insurance b. Identify two statistics that can be used to estimate these parameters. A. The sample proportion OB. The population proportion O C. The sample mean D. The sample size