A.1.5 B.2 C.-2 D.-1.5 查看答案
조회 수: 1 (최근 30일) 이전 댓글 표시 Navjot2013년 6월 29일 0 링크 번역 what is mean and standard deviation of image in image restoration and what is there effect on image 댓글 수: 0 Translated by ...
Based on the information above, what is the estimated standard deviation for security X?A. 5.6%.B. 0.3%.C. 10.1%.D. 7.8%. 正确答案:A 分享到: 答案解析: Variance = 0.3(0.01 – 0.083)2 + 0.6(0.10 – 0.083)2 + 0.1(0.20 – 0.083)2 = 0.00160 + 0.00017 + 0.00137 = 0.00314Standard...
arithmetic mean (average) 21、 算术平均值1 nE=å ain i =12. median 中位数* The median is the middle value of a list when the numbers are in order.* 先排序,后取中。3. mode 众数* The mode of a list of numbers is the nmuber that occurs most frequently in the list.* A list ...
结果一 题目 What is the meaning of the standard deviation when it is negative是什么意思 顺便用英语做一下吧 答案 标准差为负值时是什么意思 相关推荐 1 What is the meaning of the standard deviation when it is negative是什么意思 顺便用英语做一下吧 ...
What Does Standard Deviation Mean? Contents [show] What is the definition of standard deviation? Standard Deviation is a statistical tool that is used widely by statisticians, economists, financial investors, mathematicians, and government officials. It allows these experts to see how variable a ...
百度试题 题目Assuming a mean of 7.2%, what is the sample standard deviation of the returns for ABC Mutual Fund for the period 1991-2000? A. 7.8%. B. 9.8%. C. 9.1%.相关知识点: 试题来源: 解析 C 略
If the variance of a random variable X is 4, what is the standard deviation of X? A. 16 B. 2 C. 4 D. 8 相关知识点: 试题来源: 解析 B。本题考查方差与标准差的关系。方差是标准差的平方,已知方差为 4,标准差等于方差的平方根,即 2。
about what proportion of the scores are within two standard deviations of the mean?这句话是什么意思呀? 相关知识点: 试题来源: 解析 这是道数学问题意思是说 分数或比数中大概有多少部分是在平均值(MEAN)的标差值(STANDARD DEVIATION)的范围内?因为我以前做的也是英文的中文的翻译可能有点没那么标准. 分析...
If the mean is 40 and the standard deviation is 7, what is the z-score of the number 50? 相关知识点: 试题来源: 解析 The -score must be between 1 and 2\ (since)\ 40+7=47 would have a z-score of 1 while 40+2⋅ 7=54 would have a -score of 2. Use the formula: = (...