The weight of adults in a certain city has amean of 130 ibs, with standard deviation of 41 ibs .asample of 25 adults living in one of the kebeles of the city is found to have a mean weight of 129 ibs. a) does this mean the residents of the kebele weight significantly less on the basis of the 1% level of significance? b) construct the 95% Cl for the population mean. (Assume normal population.)