Question: 7. Recent years have also seen an increase in the use of ATM machines. When Mr. Selig took over the bank, the mean number of

 7. Recent years have also seen an increase in the use

7. Recent years have also seen an increase in the use of ATM machines. When Mr. Selig took over the bank, the mean number of transactions per month per customer was 5; now he believes it has increased to more than 7. In fact, the advertising agency that prepares TV commercials for Century would like to use this on a new commercial being designed. Is there sufficient evidence to conclude that the mean number of transactions per customer is more than 5 per month? Could the advertising agency say the mean is more than 8 per month

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