Add CIs for odds ratios from exponentiated logistic regression coefficients

[Copilot]

• Add a new subsection "#### Confidence intervals for exponentiated coefficients" to _sec_logistic_wald.qmd, showing how to obtain CIs for exp(β_k) by exponentiating the endpoints of the CI for β_k
• Clarify that for covariate coefficients ($k \neq 0$), $e^{\beta_k}$ is an odds ratio, while for the intercept ($k = 0$), $e^{\beta_0}$ is baseline odds
• Update R code section text and table caption to reflect that parameters(exponentiate = TRUE) produces exponentiated coefficients (not just ORs)
• Add "neq" and "exponentiating" to inst/WORDLIST
• Verify with lint (no issues)
• Verify with quarto render (succeeds)

[Copilot]

Pull request overview

Adds a focused, “single-coefficient” confidence interval result for odds ratios (via exponentiating a logistic regression coefficient CI) before the more general odds ratio CI derivation elsewhere, and updates the spellcheck WORDLIST accordingly.

Changes:

• Adds a new subsection deriving a 95% CI for (e^{\beta_k}) by exponentiating the coefficient CI endpoints.
• Adds an R example table using parameters(exponentiate = TRUE) to report exponentiated estimates and CIs.
• Adds exponentiating to inst/WORDLIST.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
_sec_logistic_wald.qmd	Inserts a new subsection on exponentiated-coefficient (OR) CIs and adds an exponentiated-parameter output table.
inst/WORDLIST	Adds exponentiating to the project spellcheck word list.

[d-morrison]

@copilot apply changes based on the comments in this thread

[Copilot]

@copilot apply changes based on the comments in this thread

Applied both review comments in commit 60a1961:

1. Renamed the subsection to "Confidence intervals for exponentiated coefficients" and added a paragraph clarifying that $e^{\beta_k}$ is an odds ratio for covariate coefficients ($k \neq 0$), but $e^{\beta_0}$ is the baseline odds (not an odds ratio) for the intercept.

2. Updated the text before the parameters(exponentiate = TRUE) code block to say "report exponentiated coefficients. The intercept is then interpreted as baseline odds, while the non-intercept coefficients are odds ratios:" and updated the table caption to "Exponentiated coefficients and 95% CIs for beetles".

[github-actions]

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