问题
单项选择题
流行病学调查的资料在分析时—般不用
A．标准差
B．中位数
C．标准误
D．平均数
E．可信区间
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
流行病学调查的资料在分析时—般不用
A．标准差
B．中位数
C．标准误
D．平均数
E．可信区间
参考答案：B
| 信息归纳 | ||||||||||||||||
| Mike is a middle school student. He goes to school from Monday to Friday. His home is about 5 miles from school. He usually walks to school. It takes him 50 minutes to walk there. Nancy’s home is a little farther. It’s 20 miles from school. So she often takes the school bus. It takes her 15 minutes to get to school. Bob lives outside the city. It’s a town 30 miles away from his school. He takes the subway. It takes him 8 minutes to get to school by subway. He can have breakfast at home and then leave for the subway station. He studies very hard.
|
