A [分析] 峰度(kurtosis)是指一个分布与正态分布在陡峭程度上的差异程度。高峰态(leptokurtic)指一个分布的峰值比正态分布更为陡峭;低峰态(platykurtosis)指一个分布的峰值比正态分布更为平缓。 如图1所示,与正态分布相比,高峰态分布会有更多的观测值集中在(算术)平均值附近(图中a区),同时会有更多远离平均值...
n. statements about a normal distribution is least accurate. A. The mean, median, and mode are equal. B. A normal distribution has excess kurtosis of three. C. The mean and variance completely define a normal distribution. D. Approximately 68% of the observations lie within +/- 1 ...
It is determined to know that up-to what percentage a mean can deviate from its normal distribution. Answer and Explanation: Since, only 3% of the value are greater than 155, its corresponding z value from the probability distribution table ...
What makes the normal distribution a probability distribution? What is the area under the standard normal distribution curve between z = 1.50, and z = 2.50? What is the special property of the standard normal distribution? Between what two values does 96% of the data lie for a standard norma...
单项选择题 Compared to a normal distribution, a lognormal distribution is least likely to be:() A. skewed to the left. B. skewed to the right. C. useful in describing the distribution of stock prices. 点击查看答案&解析手机看题 你可能感兴趣的试题...
To apply the NORM.DIST function as well as the arithmetic formula for calculating the Normal Distribution, it is required to calculate Mean and Standard Deviation first. The formula we have used for Normal Distribution is: =NORM.DIST(C5,$C$13,$C$14,FALSE) The generic syntax of the NORM....
aThe normal distribution is a continuous probability distribution that often gives a good description of data that cluster around the mean 正常分配是经常给数据一个好描述在手段附近成群的一块连续的概率分布 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 ...
The random variable X has a normal distribution with mean μ (unknown) and variance o2(known). To test the null hypothesis Ho: =o, a random sample of n observations of X is taken,and the sample mean is x. Find, in terms of μo, o and n, the set of values of x which will re...
结果1 题目 As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion only if the sample size n is greater than or equal to 30.A.对B.错 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
Answer to: Suppose the standard deviation of a normal distribution is 12 and 95% of the values are greater than 6. What is the value of the mean?...