Asample of 80 high school seniors,45% were are female were surveyed as to wheather or not they are employed outside of school , 25 % of the boys surveyed said they are not employed how many boys are employed

Harold took five different samples of thirty-five randomly selected students from the 520 students he surveyed. the means of the samples are shown below. sample mean sample 1: 3.4 sample 2: 3.2 sample 3: 4.1 sample 4: 4.6 sample 5: 3.1 the predicted mean of the population will fall between 3.1 and ?