原文链接：http://tecdat.cn/?p=10134

library(BaylorEdPsych)
library(simglm)
library(ggplot2)
library(dplyr)
library(mice)
fixed <- ~1 + age + income
fixed_param <- c(2, 0.3, 1.3)
cov_param <- list(dist_fun = c(‘rnorm‘, ‘rnorm‘),
                  var_type = c("single", "single"),
                  opts = list(list(mean = 0, sd = 4),
                              list(mean = 0, sd = 3)))

ggplot(little.mcar.p, aes(x = n, y = p)) + geom_boxplot() +
  geom_crossbar(aes(ymin = q025, y = q05, ymax = q075), data = summarise(
    group_by(little.mcar.p, n), q025 = quantile(p, .025, na.rm = TRUE),
    q05 = quantile(p, .05, na.rm = TRUE), q075 = quantile(p, .075, na.rm = TRUE)
  )) +
  geom_hline(yintercept = .05) +
  scale_y_continuous(breaks = seq(0, 1, .05), limits = c(0, 1)) +
  labs(x = "Sample size", y = "p-value",
       title = "Little‘s MCAR test for data that are MCAR",
       subtitle = "2000 replications",
       caption = paste(paste("For the narrow boxes, going from top to bottom, lines",
                             "represent 7.5th, 5th and 2.5th percentiles of p-values."),
                       "Test maintains nominal error rate across wide range of sample sizes.",
                       sep = "\n"))

?

ggplot(little.mcar.p.mar, aes(x = n, y = p)) + geom_boxplot() +
  geom_crossbar(aes(ymin = q925, y = q95, ymax = q975), data = summarise(
    group_by(little.mcar.p.mar, n), q925 = quantile(p, .925, na.rm = TRUE),
    q95 = quantile(p, .95, na.rm = TRUE), q975 = quantile(p, .975, na.rm = TRUE)
  ), linetype = 2) +
  geom_hline(yintercept = .05) +
  scale_y_continuous(breaks = seq(0, 1, .05), limits = c(0, 1)) +
  labs(x = "Sample size", y = "p-value",
       title = "Little‘s MCAR test for data that are MAR",
       subtitle = "2000 replications",
       caption = paste(paste("For the dashed boxes, going from top to bottom, lines",
                             "represent 97.5th, 95th and 92.5th percentiles of p-values."),
                       "Test only maintains nominal error rate around sample size of 120.",
                       sep = "\n"))

?

回归接近完美（没有多重共线性）。

如果您有任何疑问，请在下面发表评论。

大数据部落 -中国专业的第三方数据服务提供商，提供定制化的一站式数据挖掘和统计分析咨询服务

统计分析和数据挖掘咨询服务：y0.cn/teradat（咨询服务请联系官网客服）

?QQ：3025393450

?QQ交流群：186388004 

【服务场景】  

科研项目; 公司项目外包;线上线下一对一培训;数据爬虫采集;学术研究;报告撰写;市场调查。

【大数据部落】提供定制化的一站式数据挖掘和统计分析咨询

欢迎关注微信公众号，了解更多数据干货资讯！

欢迎选修我们的R语言数据分析挖掘必知必会课程！

R语言在不同样本量下的Little's MCAR检验

原文地址：https://www.cnblogs.com/tecdat/p/12205097.html