A Random Sample of 26 Checking Accounts at a Bank

question 21

Short Answer

A random sample of 26 checking accounts at a bank showed an average daily balance of $300 and a standard deviation of $45. The balances of all checking accounts at the bank are normally distributed. Develop a 95% confidence interval estimate for the mean of the population.

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Definitions:

Fixed Costs

Costs that do not change with the level of output, remaining constant regardless of the scale of production or services provided.

Marginal Revenue

The additional income from selling one more unit of a good; sometimes equal to the price of the good.

Total Fixed Costs

The sum of all costs that remain constant regardless of the level of production or output in a business.

Recession

A period of declining real GDP, accompanied by lower real income and higher unemployment.