One Way ANOVA

One way analysis of variance

ifr_oneway_anova(data, x, y, ...)

Arguments

data	a data.frame or a tibble
x	numeric; column in data
y	factor; column in data
...	additional arguments passed to or from other methods

Value

ifr_oneway_anova returns an object of class "ifr_oneway_anova". An object of class "ifr_oneway_anova" is a list containing the following components:

adjusted_r2

adjusted r squared value

df_btw

between groups degress of freedom

df_within

within groups degress of freedom

df_total

total degress of freedom

fstat

f value

group_stats

group statistics

ms_btw

between groups mean square

ms_within

within groups mean square

obs

number of observations

pval

p value

r2

r squared value

rmse

root mean squared error

ss_between

between group sum of squares

ss_within

within group sum of squares

ss_total

total sum of squares

References

Kutner, M. H., Nachtsheim, C., Neter, J., & Li, W. (2005). Applied linear statistical models. Boston: McGraw-Hill Irwin.

See also

anova

Examples

ifr_oneway_anova(mtcars, mpg, cyl)
#>                                ANOVA                                 
#> --------------------------------------------------------------------
#>                    Sum of                                           
#>                   Squares     DF    Mean Square      F        Sig.  
#> --------------------------------------------------------------------
#> Between Groups    824.785     2       412.392      39.699      0    
#> Within Groups     301.263     29      10.388                        
#> Total             1126.048    31                                    
#> --------------------------------------------------------------------
#> 
#>                  Report                  
#> ----------------------------------------
#> Category    N       Mean      Std. Dev. 
#> ----------------------------------------
#>    4        11     26.664       4.510   
#>    6        7      19.743       1.454   
#>    8        14     15.100       2.560   
#> ----------------------------------------
#> 
#> Number of obs = 32        R-squared     = 0.7325 
#> Root MSE      = 3.2231    Adj R-squared = 0.714 
#> 
ifr_oneway_anova(hsb, write, prog)
#>                                 ANOVA                                  
#> ----------------------------------------------------------------------
#>                    Sum of                                             
#>                    Squares     DF     Mean Square      F        Sig.  
#> ----------------------------------------------------------------------
#> Between Groups    3175.698      2      1587.849      21.275      0    
#> Within Groups     14703.177    197      74.635                        
#> Total             17878.875    199                                    
#> ----------------------------------------------------------------------
#> 
#>                  Report                   
#> -----------------------------------------
#> Category     N       Mean      Std. Dev. 
#> -----------------------------------------
#>    1        45      51.333       9.398   
#>    2        105     56.257       7.943   
#>    3        50      46.760       9.319   
#> -----------------------------------------
#> 
#> Number of obs = 200       R-squared     = 0.1776 
#> Root MSE      = 8.6392    Adj R-squared = 0.1693 
#>