Many naturally occurring phenomena appear to be normally distributed. For example, the average height of a human is roughly 175 cm (5' 9"), counting both males and females. As the chart below shows, most people conform to that average. Taller and shorter people exist with decreasing frequency...
A normal distribution of data is one in which the majority of data points are relatively similar, meaning they occur within a small range of values with fewer outliers on the high and low ends of the data range. When data are normally distributed, plotting them on a graph results a bell-...
A normality test determines whether a sample data has been drawn from a normally distributed population. It is generally performed to verify whether the data involved in the research have a normal distribution. Many statistical procedures such as correlation, regression, t-tests, and ANOVA, namely ...
Lognormal distribution is the probability distribution of a variable with a normally distributed logarithm. It's commonly used in...
Answer to: What kind of variables is normally distributed? By signing up, you'll get thousands of step-by-step solutions to your homework...
翻译：如果这一堆观测量是正态分布的，那么这些观测量中有百分之多少的观测量是距离平均值大于1.3个标准差的（那个符号是标准差的意思）因为任何正态分布的变量都可以转化成标准正态分布变量（所有变量减去均值以后再除以标准差）之后就可以查询标准正态分布比例表了，Φ(z=1.3)-Φ(z=-1.3)=0....
One method of analyzing nonnormal data is to convert or transform the original measurements so that they are expressed on a new scale that is more likely to be normally distributed. When testing the difference between two groups and if previous data indicate nonnormality, then the data can ...
在正态分布总体中,中值、均值和众数的关系是In a normally distributed population, what is the relationship among the median, mean and mode? A. 他们在数值上相等 they are equal in value B. 都不同each has a different value C. 众数与均值和中位数不同mode is D. ifferent from median and mean...
Suppose that X is normally distributed with a mean of 50 and a standard deviation of 8. What is P(X≤65.60)? Normal Distributions: A normally distributed random variable X with mean μ and standard deviation σ can be converted to a...
EXERCISE 10 Regression and correlation (Section 6.2)]. Consider the standard normal-theory linear regression model with one covariate in which the observations are independent, normally distributed with conditional mean E(Y | x) = a - x and constant variance\sigma^{2}. The parameter space is ...