Problemxˉ, {5,10,15,20}\bar{x},\ \{5, 10, 15, 20\}xˉ, {5,10,15,20}分步解答求和:5+10+15+20=505 + 10 + 15 + 20 = 505+10+15+20=50。个数:n=4n = 4n=4。平均数:xˉ=50/4=12.5\bar{x} = 50 / 4 = 12.5xˉ=50/4=12.5。答案xˉ=12.5\bar{x} = 12.5xˉ=12.5想解其他题?打开 mean-median-mode 求解器 →相关例题/solve/statistics/mean-of-2-4-6-8-10