When a sample of n observations is taken from a normally distributed population having mean M and standard deviation D, the sample mean, m, and the sample standard deviation, d, will differ from M and D because of the randomness of the sample. Az-score can be calculatedwith the population...
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)=0.9...
Suppose that X is normally distributed with a mean of 100 and a standard deviation of 29. What is the probability that X is greater than 153.947? Suppose that X is normally distributed with a mean of 100 and a standard deviation o...
Given that X is normally distributed with a mean of 0.545 and a standard deviation of 0.155, calculate the probability that X exceeds 0.395. Given that X is normally distributed with a mean of 0.545 and and standard deviati...
When data are normally distributed, plotting them on a graph results a bell-shaped and symmetrical image often called the bell curve. In such a distribution of data,mean, median, and modeare all the same value and coincide with the peak of the curve. ...
Does ANOVA Rely on Any Assumptions? Yes, ANOVA tests assume that the data is normally distributed and that variance levels in each group are roughly equal. Finally, it assumes that all observations are made independently. If these assumptions are inaccurate, ANOVA may not be useful for comparing...
The mean is a useful measure when the data is normally distributed and the outliers do not significantly affect the overall pattern of the data. Regression Regression Analysis is a statistical method used to model the relationship between two or more variables. It is a powerful tool for predict...
Normally-distributed data form a bell shape when plotted on a graph, with more observations near the mean and fewer observations in the tails. The t-distribution is used when data are approximately normally distributed, which means the data follow a bell shape but the population variance is ...
Answer to: Isat test scores are normally distributed with a mean of 152 and a standard deviation of 5. What score would place you in the top 2% of...
Given two variables x and y, what does Corr(x, y) = 0 mean? What parameter controls the spread of the Normal curve? What type of data (discrete or continuous) is the following variable? Number of peanuts in a can of Planter's Mixed Nuts. a. discrete b. continuous What would the ...