Test the claims: statistics question

6. Test the claims: exact 25% of U.S. residents have been to a hospital emergency room in 2020. You are given a sample of 800 US residents in which 100 respondents went to hospital emergency room in 2020 and 700 respondents did not go to hospital emergency room in 2020. Answer following question: a. (2pt) State the null and alternative hypotheses. H. : H : In this setting, is the test a one-tailed test or two-tailed test? b. (Ipt) Under the null hypothesis, what is the statistics that we know its probability distribution? Under the null hypothesis, will follow distribution with mean equal to standard deviation equal to (and if any degree of freedom equal to c. (2pt) Calculate the test statistics and give your decision of rejecting or not rejecting the null hypothesis at the significance level of 5%