平均数

suàn píng jūn shù

算平均数

calculate the mean

qǔ píng jūn shù

取平均数

take the mean

bù tóng nián líng zǔ gè gè sè pán de cuò wù jì fēn píng jūn shù zài jiān

不同年龄组各个色盘的错误记分平均数在2.18～2.75间。

The mean error score of each chips in each color group was 2.18-2.75.

sì wǔ jiǔ zhè sān gè shù de píng jūn shù shì liù

四、五、九这三个数的平均数是六。

The average of 4, 5 and 9 is 6.