All tidying methods return a data.frame without rownames, whose
structure depends on the method chosen.
tidy.aareg
returns one row for each coefficient, with
the columns
termname of coefficient
estimateestimate of the slope
statistictest statistic for coefficient
std.errorstandard error of statistic
robust.serobust version of standard error estimate
zz score
p.valuep-value
glance returns a one-row data frame containing
statisticchi-squared statistic
p.valuep-value based on chi-squared statistic
dfdegrees of freedom used by coefficients