Mathematics, 24.03.2021 19:40, psa180

A company has historical reasons to believe that 30% their customers will return to buy a second item. They colled a random sample of 250 recent orders an calculated the percentage who bought a second item. They hope that the percentage has increased due to a recent advertising campaign . HELP ASAP

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A company has historical reasons to believe that 30% their customers will return to buy a second ite...