Standard deviation is a statistical measure that indicates how much variation or dispersion exists in a set of data. It measures the amount of variation or deviation from the average or mean value of the data. The standard deviation is a widely used statistical tool in research, quality control...
The standard deviation is the square root of the variance. If the variance of a data set is 4, the standard deviation is ___. A. 1 B. 2 C. 3 D. 4 相关知识点: 试题来源: 解析 B。解析:方差为 4,标准差是方差的平方根,即 2。反馈...
Find the standard deviation for the following class grades: 2.00.59.96.46.28.51.52.4 What is the standard deviation if the series is the total population? The Standard Deviation: The standard deviation is a measure of dispersion. It tells us the average deviation of each of the individ...
a简单来说,标准差是一组数据平均值值分散程度的一种度量。一个较大的标准差,代表大部分数值和其平均值之间差异较大;一个较小的标准差,代表这些数值较接近平均值。 Simply speaking, the standard deviation is a group of data mean value value dispersion degree one kind of measure.A big standard deviation...
(S) may be given by the formula S=n where E indicates that the squared differences between the value of each item of dat a and the mean should be summed.For example, to find the standard deviation of the ages of a group of eight people in a room, the mean is first found ( in ...
The standard deviation is a measure of the average difference in values in a given number set. The standard deviation sigma can be calculated for a...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
In a data set of test scores, the mean score is 80 and the standard deviation is 10. If a student's score is 90, the probability of getting a score higher than this is ___. A. 成平机北建争有报并记交我之成平机北建争有报并记交我之0.1587成平机北建争有报并记交我之成平机北...
<p>To solve the question, we need to understand the relationship between standard deviation and mean deviation. </p><p>1. <strong>Understanding the Definitions</strong>: - <strong>Mean Deviation</strong>: It is the average of the absolute deviations o
Is the standard deviation tied to the mean?‖ Teaching Statistics - Gordon - 1986Gordon, T. (1986). "Is the standard deviation tied to the mean?" Teaching Statistics, 8(2), 40-2. (Reprinted in Green, D.R. (ed.) (1994).Tim Gordon. Is the standard deviation tied to the mean?
A. central tendency B. dispersion C. frequency D. correlation 相关知识点: 试题来源: 解析 B。本题考查统计学中标准偏差的概念。标准偏差是用来衡量数据的离散程度,即分散程度,选项 A 中心趋势通常由均值、中位数等表示;选项 C 频率指某个值出现的次数;选项 D 相关性用于描述两个变量之间的关系。反馈...