which of the following are true statements?
which of the following are true statements?
i.All symmetric histogram have single peaks.
ii.All symmetric bell-shaped curves are normal.
iii.All normal curves are bell-shaped and symmetric.
btw：bell-shaped curve不是本来就symmetric吗,为啥题目还要指出啊,另外可以给一下normal curve的定义吗!
i.All symmetric histogram have single peaks.
ii.All symmetric bell-shaped curves are normal.
iii.All normal curves are bell-shaped and symmetric.
btw：bell-shaped curve不是本来就symmetric吗,为啥题目还要指出啊,另外可以给一下normal curve的定义吗!
赞 刘勇峰 春芽
共回答了13个问题采纳率：100% 举报
对称直方图可以有多个峰
bell-shaped 不是科学的描述,只是对形状的直观感觉.二次函数也可以说是bell-shaped,所以不一定是normal curvethis is the true statement关于“ bell-shaped curve不是本来就symmetric吗” bell-shaped curve 在不同语境（教材）下有不同的定义,比如我可以认为chi-squared distribution 也是bell-shaped curve,但是它不对称.但无论你定义中的bell-shaped curve是否对 称,都不影响2错3对.normal curve的定义,就是gaussian function: http://en.wikipedia.org/wiki/Gaussian_function
bell-shaped 不是科学的描述,只是对形状的直观感觉.二次函数也可以说是bell-shaped,所以不一定是normal curvethis is the true statement关于“ bell-shaped curve不是本来就symmetric吗” bell-shaped curve 在不同语境（教材）下有不同的定义,比如我可以认为chi-squared distribution 也是bell-shaped curve,但是它不对称.但无论你定义中的bell-shaped curve是否对 称,都不影响2错3对.normal curve的定义,就是gaussian function: http://en.wikipedia.org/wiki/Gaussian_function
1年前
8
可能相似的问题
你能帮帮他们吗