Question

The U.S. Energy Administration reported that the mean price for a gallon of regular gasoline in the U.S, was $2.357. You are asked to test at a 06 level of significance whether the mean price for a gallon of gasoline in the Lower Atlantic states is different from the national mean. You sample 50 service stations in the Lowe determined the mean price for a gallon of regular gasoline was $2.343. The standard deviation for all stations in the lower Atlantic states is $.044. What is your conclusion? (Prove statistically) 1) r Atlantic states and

Answer 1

Solution US Eneray Admin?stration ne bntes Rat e meam Pr on lleus wa8 $2.35孑 cfor a ve 2-343 test 3tatisttc LWe are besi "X 2-343-2. 357

eayee - val こ | 2.25 = o.ob Two taileg be Conclu\ion! Henc-, iR data Provides sufficre nican ce