Does sample data indicate that mean account balance declined
With many other options available, customers no longer let their money sit in a checking account. For many years the mean checking balance has been $1,600. Does the sample data indicate that the mean account balance has declined from this value?
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the given categories is 18% for the under 26 group, 39% for the group, 31% for the 45-65 group, and 12% for the group over 65. Find the critical value to test the claim that all ages have purchase rates proportional to their driving rates.
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For many years the mean checking balance has been $1,600. Does the sample data indicate that the mean account balance has declined from this value?
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