I need perfect answer

Saved The Cambridge Power and Light Company selected 20 residential customers at random. Following are the amounts, to the nearest dollar, the customers were charged for electrical service last month: $65 118 171 38 141 73 110 84 120 56 158 120 120 76 32 100 126 98 109 70 a. Compute the arithmetic mean. (Round the final answer to 2 decimal places.) Arithmetic mean $ b. Indicate whether it is a Statistic or a Parameter. (Click to select) v