Mathematics, 09.03.2021 04:00 sancho7511

A website that sells movie tickets can tell what devices are used to access their site and make purchases. The manager of the website is approached by members of a movie production company who want to partner in the development of a phone app. To estimate what proportion of ticket buyers make purchases using their smart phones, 400 users of the website were randomly sampled from the existing database and 180 were found to have used their smart phones.

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A website that sells movie tickets can tell what devices are used to access their site and make purc...