In the article “Factors associated with potentially missed diagnosis of appendicitis in the emergency department” published in JAMA Network Open (Mahajan, 2020), the authors reported that 217 of 973 children classified as potentially missed apendicitis diagnosis had a unrinalyis test. Use this information to compute a 98% confidence interval for the proportion of children classified as potentially missed apendicitis diagnosis who had a unrinalyis test.