Parents of teenage boys often complain that auto insurance costs more, on average, for teenage boys than for teenage girls. a group of concerned parents examines a random sample of insurance bills. sample 1 is comprised of 31 teenage boys sample 2 is comprised of 26 teenage girls. the mean annual cost for teenage boys was 725. for teenage girls, it was 600. from past years, it is known that the population standard deviation for boys is 180 and for girls is 185. determine whether or not you believe that the mean cost for auto insurance for teenage boys is different than that of teenage girls, using α=0.05.

Inventory by three methods; cost of goods sold the units of an item available for sale during the year were as follows: jan. 1 inventory 20 units at $1,800 may 15 purchase 31 units at $1,950 aug. 7 purchase 13 units at $2,040 nov. 20 purchase 16 units at $2,100 there are 18 units of the item in the physical inventory at december 31. determine the cost of ending inventory and the cost of goods sold by three methods, presenting your answers in the following form: round your final answers to the nearest dollar. cost inventory method ending inventory cost of goods sold a. first-in, first-out method $ $ b. last-in, first-out method $ $ c. weighted average cost method $ $