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An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Yo need asap pls ! markin da brainiest too !

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table