3 A bus company is doing research to determine if it can save money by switching from gasoline powered buses to electric powered buses The company randomly selects records of gasoline usage from 30 days and calculates that the buses use a mean 22 gallons of gas each day with a standard deviation of 1 8 gallons The gas station the buses use charges 2 95 for a gallon of gas The company also knows it would cost 62 to charge the buses enough to be able to run for one day Use a 95 confidence interval to recommend a strategic decision for the bus company