Which of the following tool is used for constructing confidence intervals and calculating standard errors for difficult statistics?

The correct answer is B. bootstrap.

Bootstrapping is a statistical method for estimating the sampling distribution of a statistic by repeatedly sampling with replacement from the original sample. This can be used to construct confidence intervals and calculate standard errors for difficult

statistics.

Baggier is a statistical software package that can be used for a variety of tasks, including bootstrapping.

Jacknife is

another statistical method that can be used to estimate the sampling distribution of a statistic. However, it is less commonly used than bootstrapping.

None of the other options are correct.