Error in studentized bootstrap CIs

[mayer79]

There is a mistake in the studentized bootstrap CIs for

• ci_mean()
• ci_mean_diff()
• ci_var()
• ci_sd(), and
• ci_proportion()

Mainly affected are the first two function, because there, studentized bootstrap is the default bootstrap method.

The problem: boot::boot() expects as second component a function for the variance, not for the standard deviation of the estimator. This will lead to wrong reference distributions and thus, to wrong confidence intervals.