问题如下:
What is the main difference between a simulation and the bootstrap?
选项:
解释:
A simulation uses draws from a specific distribution to simulate the shocks and other quantities in a model error. A simulation requires a fully specified model that provides the distribution of all random quantities. A bootstrap uses random sampling from the observed data to produce a new dataset that has similar characteristics. In a bootstrap, the random samples are used to generate indices when selecting the data to include in the bootstrap sample.
In a bootstrap, the random samples are used to generate indices when selecting the data to include in the bootstrap sample.这句话怎么理解?