最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
In a quality-control test, 50 boxes-each containing 30 machine parts-were examined for defective parts. The number of defective parts was recorded for each box, and the average (arithmetic mean) of the 50 recorded numbers of defective parts per box was 1.12. Only one error was made in recording the 50 numbers: "1" defective part in a certain box was incorrectly recorded as "10".
Quantity A
The actual average number of defective parts per box
Quantity B
0.94
C显示答案
以上解析由 考满分老师提供。
