mean_table improve confidence intervals

[mbcann01]

• [x] Limit the default output to just the most commonly needed stats
• [x] Adjust classes of the output tibble.
• [x] Add ability to control alpha for confidence intervals

Is there a way to force CI's to have a lower bound of zero when negative values don't make sense?

• [ ] Find an answer today
• [ ] If it makes sense, then add this functionality

[mbcann01]

Suggestions from Sumi:

You can use the exact method based on the chi-squared distribution which will not yield a negative.

https://www.statsdirect.com/help/rates/poisson_rate_ci.htm

https://stats.stackexchange.com/questions/10926/how-to-calculate-confidence-interval-for-count-data-in-r