A researcher is studying the effectiveness of a new medication for asthma attacks. After a two-week period on the medication, the number of asthma attacks was recorded in a frequency table, reported below. Attacks (X) f 0 1 1 5 2 3 3 2 4 1 5 1 The next four (4) questions will use Research Study A. Based on Research Study A provided above, answer the following question: 1. What is EX for this frequency table