A local university produces a study in which it chose 1000 students to participate the study asked each student to write down the number of hours spent studying in one week period which element of expire the design is known to be part if this study
a. blinding
b. replication
c. randomization

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?