The U.S. Department of Agriculture reports that the mean cost of raising a child from birth to age 2 in in a rural area is 8420 dollars. You believe this value is is too low, so you sample 15
rural families and find the following costs (in dollars) of raisinf a child from birth to age 2
8421,8537,8503,8394,8458,8462,8488,8511,8451,8481,8367,8601,8472,8397,8569
Conduct a hypothesis test based on this sample data, with α=5%. Answer the question, is the mean cost of raising a child greater than 8420 dollars?