Sandra wants to study how students in their senior year of high school prepare for college. She starts by visiting an elite boarding school nearby. Sandra knows that to make general claims about seniors preparing for college, she will need to randomly select from the population she wants to generalize to. return to the high school next year to study the new seniors. be aware of her intentions, so the study will be valid and reliable. visit more schools so that her sample is representative of the group she wants to generalize to

- Visit more schools so that her sample is representative of the group she wants to generalize to.

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.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals

answer; role- taking;