A cell phone company offers two plans to its subscribers; When they sign the contract, they are asked for some demographic information. The median annual income for a sample of 40 plan A subscribers is $ 57,000.00, with a standard deviation of $ 9,000.00. Regarding plan B, the median income of a sample of 30 subscribers is $ 61,000.00 with a standard deviation of $ 7,100.00. With the significance level of 0.05, is it reasonable to conclude that the median income of those who choose plan B is higher?