Returns a ggplot or plotly object of a normal distribution with a specified significance level
ploterrors(means = 0, sds = 1, alpha = 0.05, direction = intToUtf8("8800"), plotly = FALSE)
| means | mean of normal distribution  | 
    
|---|---|
| sds | standard deviation of normal distribution  | 
    
| alpha | significance level  | 
    
| direction | direction of alternative hypothesis  | 
    
| plotly | specifies whether a plotly object is desired  | 
    
A ggplot or plotly object, depending on whether the plotly argument was specified TRUE or FALSE.