A tibble::tibble with columns:
\item{term}{Term in design}
\item{statistic}{Approximate F statistic}
\item{num.df}{Degrees of freedom}
\item{p.value}{P-value}
Depending on which test statistic is specified, one of the following
columns is also included:
\item{pillai}{Pillai's trace}
\item{wilks}{Wilk's lambda}
\item{hl}{Hotelling-Lawley trace}
\item{roy}{Roy's greatest root}