(1)試說明以最小平方法校估上述模式時,其參數估計值有何特性?(4%)

四、(10%) A taxi is traveling back and forth along a linear route of k miles for servicing customers who call for a ride. Customer calls may occur randomly at any location on the route. Suppose that the taxi will respond to and go picking the customer immediately when it receives his/her call. Find the average moving distance (in miles) of the taxi from where it answered a call to the customer?