This function will provide predicted IRR statistics for various percent
agreements. There are two elements in the returned list: `model` and
`summary`. The former are the results of the modeling function and the
latter is a `data.frame`

providing the predicted values for various
percent agreements. If `stat = 'all'` is specified, the summary
table contains the predicted values. If a specific IRR statistic is specified,
the summary table contains the predicted value along with the interval.

## Arguments

- object
the result of IRRsim::simulateIRR().

- method
the method used to find predicted values. Possible values are loess, linear, and quadratic.

- agreements
vector of percent agreements to include in the summary table.

- stat
the IRR statistic to return summary for, or missing for all metrics.

- k
which number of raters to print summary of.

- predict.interval
Type of interval calculation. Can be none, confidence, . or prediction.

- ...
currently unused.