A researcher is interested in knowing the average height of the women in a village. To the researcher, the population of interest is the in the village, the relevant population data are the in the village, and the population parameter of interest is the . There are 480 women in the village, and the sum of their heights is 2,620.8 feet. Their average height is feet. Instead of measuring the heights of all the village women, the researcher measured the heights of 20 village women and calculated the average to estimate the average height of all the village women. The sample for his estimation is , the relevant sample data are the , and the sample statistic is the . If the sum of the heights of the 20 village women is 102 feet, their average height is feet.