A Sample of Holiday Shoppers Is Taken Randomly from a Local

question 118

Short Answer

A sample of holiday shoppers is taken randomly from a local mall to determine the average daily spending on gifts. From a preselected sample, the standard deviation was determined to be $26. You would like to construct a 95% confidence interval for the mean daily spending on all holiday spending.
A) Find the appropriate sample size necessary to achieve a margin of error of $5.
B) Find the appropriate sample size necessary to achieve a margin of error of $8.

• A) Find the appropriate sample size necessary to achieve a margin of error of $5.
• B) Find the appropriate sample size necessary to achieve a margin of error of $8.

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Definitions:

Opportunity Cost

The cost of foregoing the next best alternative when making a decision. It represents the benefits an individual, investor, or business misses out on when choosing one alternative over another.

Production Possibilities Frontier

A graphical representation showing the maximum quantity of two goods or services that an economy can produce when all resources are used efficiently.

Opportunity Cost

Opportunity cost is the value of the next best alternative forgone as a result of making a decision.

Bananas

A curved, yellow fruit that is rich in potassium and can be eaten raw or used in cooking and baking.