Executives at a large corporation hired a psychologist to evaluate two physical fitness programs that differed specifically in the degree to which diet and nutritional suggestions were part of the
program. Both plans required regular exercise but Plan N included diet/nutritional requirements for
all participants while Plan E only emphasized a regular exercise program for all participants, but did
not require participants to change their eating habits. The nature and amount of exercise required
in the two programs were essentially the same. Two hundred employees were placed in equal
numbers (100) to either Program Nor Program E. Each program lasted 6 months, during which time
employee absenteeism in each group was monitored. At the end of the program, participants were
given a questionnaire designed to assess attitudes toward the company and the fitness program.
Because of transfers within the company, firing and quitting of employees, and other reasons not
able to be documented, only 75 out of 100 employees in Group E finished the program, and only 50
of the original 100 participants from Program N completed the 6-month program. The psychologist
judged that these sample sizes were still sufficiently large enough to assess adequately the effect of

i dont know but thats a great qusestion

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

they produces sugar..

hope this , question was a little open ended

answer; criterion validity