[r] the average gasoline price of one of the major oil companies has been $2.28 per gallon. because of shortages in production of crude oil, it is believed that there has been a significant increase in the average price. in order to test this belief, we randomly selected a sample of 41 of the company's gas stations and determined that the average price for the stations in the sample was $2.31 with a standard deviation of $0.15. assume the population is normally distributed. conduct an appropriate hypothesis test. find the t-statistic and the appropriate conclusion at the 0.01 level of significance. group of answer choices
