问题如下图:
选项:
A.
B.
C.
解释:
能不能理解该图是左偏?如果是为什么不选b呢?
Olive_品职助教 · 2019年07月25日
同学你好,变量有离散的也有连续的,是不一样的,对于离散变量,概率分布图就是用直方图或者折线图表现频率。
像正态分布这种连续分布则是一个概率密度图,纵轴没什么实际含义,而函数与X轴围成的面积则表示概率。
这道题考的很直接,直接读数就行,不用考虑太复杂。解题思路可以看一下这个回答:http://class.pzacademy.com/#/q/21961
按照你的理解,图形是左偏的分布,对于左偏分布,左侧尾巴上的取值频率低,右侧频率高,所以按照这个思路也不应该选B。加油!
NO.PZ2017092702000044 No.PZ2017092702000044
NO.PZ2017092702000044 wless frequent thyen preciation. in the 0.0 to 2.0 intervoccurre20% of the time. A is correct. Twenty observations lie in the interv\"0.0 to 2.0,\" ansix observations lie in the 2.0 to 4.0 interval. Together, they represent 26/48, or 54.17% of all observations, whiis more th50%.这道题 图还是看不懂 要估计着数字么 感觉数字对不大上 横轴纵zhou不太懂什么意思
wless frequent thyen preciation. in the 0.0 to 2.0 intervoccurre20% of the time. A is correct. Twenty observations lie in the interv\"0.0 to 2.0,\" ansix observations lie in the 2.0 to 4.0 interval. Together, they represent 26/48, or 54.17% of all observations, whiis more th50%.b的题目是什么意思?
这道题26是怎么看出来的呀,纵轴每个点对应几有点看不明白
wless frequent thyen preciation. in the 0.0 to 2.0 intervoccurre20% of the time. A is correct. Twenty observations lie in the interv\"0.0 to 2.0,\" ansix observations lie in the 2.0 to 4.0 interval. Together, they represent 26/48, or 54.17% of all observations, whiis more th50%. b为什么是错的,语句语法其实本来就不对,有其他原因吗