Answer:
- Visit more schools so that her sample is representative of the group she wants to generalize to.
Step-by-step explanation:
Sandra must 'visit more and more schools in order to ensure that the sample which she selects appropriately represents the group about which she is generalizing.' In the Inferential statistics, to reach an accurate, authentic, and objective inference about the representative population, the selection of the sample must be unbiased and random. Thus, the sample must be selected from a wide area to offer equal opportunity to every part of population to represent that assists in making valid and reliable claims.