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Mathematics 9 Online
OpenStudy (anonymous):

At the foremost state bank the average savings account balance in 2012 was $1300. A random sample of 45 savings account balances for 2013 yielded a mean of $135 with a standard deviation of $80 At ox=0.1 significance level, can we conclude that the mean savings account balance in 2013 is different from the mean savings account balance in 2012.

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