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7 Did You Use a Mobile Device The Monterey Bay Aquarium founded in 1984 is...

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7 Did You Use a Mobile Device The Monterey Bay Aquarium founded in 1984 is situated on the beautiful coast of Monterey Bay in the historic Cannery Row district In 1985 the aquarium began a survey program that involved ran domly sampling visitors as they exit for the day The survey includes visitor de mographic information use of social media and opinions on their aquarium visit In 2015 the survey included 356 visitors over age 65 of which 52 used a mobile device such as an Android phone or iPad during their visit a What is the margin of error of the large sample 95 confidence interval for the proportion of visitors over 65 who used a mobile device during their visit b How large a sample is needed to get the common 3 percentage point margin of error Use the 2015 sample as a pilot study to get p

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