The manufacturer of the Yana stecl-belicd radial truck tire claims that the mean mileage the tire can be driven before the tread wears oat is 56,000km. Assume the mileage wear follows the normal distribution and the standard deviatioe of the distribution is 4.630km. Keaya Truck Company bought 48 tires and found that the mean mileage for its trucks is 53,500km. Suppose you wish to detemaine if the Kenya Truck Company experience is different from that clained by the manufacturer at the .05 significance level? What is the test statistic for you hypothesis? Select one: 2.76 1.373.74 2.09 1.98 1.26.