A confidence interval (a vector of 2 elements; longer
vectors work, but I guess that wouldn't make sense).
sep
The separator of the values, usually "; " or ", ".
prefix, suffix
The prefix and suffix, usually a type of
opening and closing parenthesis/bracket.
digits
The number of digits to which to round the values.
noZero
Whether to strip the leading zero (before the decimal
point), as is typically done when following APA style and
displaying correlations, p values, and other numbers that cannot
reach 1 or more.