Part 5 - box plot 两端是最大最小值,箱子两端1st 和 3rd,中间是median 栗子1: 对称 栗子2: 有outlier的情况 栗子3: 缺点为看不清gap和cluster 栗子4: 当有很多组数据是,箱型图就能非常直观的告诉我们数据组之间的差别 。 总而言之,箱线图为我们提供了 非常漂亮的图形化图片。 当我们有两组或更多组观察...
Discover what a normal distribution is and how it’s used. Learn about its properties, applications and its relationship to the mean and standard deviation.
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STAT 2 Lecture 7: Normal distributions Review: box plots Box plots vs histograms ● Box plots are better at telling you roughly what proportion of the data are above or below a particular value ● Histograms show you the whole distribution Today ● What to do with outliers? ● What is a ...
STEP 3: Plot Normal Distribution in Excel Select theMarksrangeC5:C12. ChooseHome ➤ Editing ➤ Sort & Filter ➤ Sort Smallest to Largest. A warning dialog box will pop out. Check the circle for the second option. PressSort. It’ll return the sorted marks column. ...
pd = NormalDistribution Normal distribution mu = 0 sigma = 1 Specify the x values and compute the cdf. Get x = -3:.1:3; p = cdf(pd,x); Plot the cdf of the standard normal distribution. Get plot(x,p) Compare Gamma and Normal Distribution pdfs Copy Code Copy Command The ...
BoxplotsBoxplots use the 5-number summary (minimum and maximum values with the three quartiles) to illustrate the center, spread, and distribution of your data. When paired with histograms, they give an excellent description, both numerically and graphically, of the data...
Learning Objectives In this chapter, you learn: To compute probabilities from the normal distribution计算正态分布概率 To use the normal probability plot to determine whether a set of data is approximately normally distributed利用正态概率图来判断某一数据
Normal distribution with µ = 2 and σ = 3. The normal distribution is very important because of the following points: 1. Many practical distributions approximate to the normal distribution. Look at the histograms of lifetimes given in Figure 21.3 and of resistances given in Figure 21.4 and...
When the number of data is small, it is risky to assume a normal distribution without a proper testing. Apart from histogram, box-plot, and stem-and-leaf displays, one of the most useful tools for assessing normality is a quantile–quantile or QQ plot. This is a scatterplot with the ...