Cody Stopped by the Grocery Store on the Way Home

question 190

Multiple Choice

Cody stopped by the grocery store on the way home from school. He had nine dollars in his wallet. He selected the following items: a can of green beans at $.39; a jar of dill pickles at $2.29; three pounds of hamburger at $4.39; a head of lettuce at $.95; and a bottle of dressing at $1.49. First, he estimated the cost of the groceries to the nearest dollar then decided to also estimate to the nearest dime. Give both estimates and decide which method was more accurate for this situation.

• A) Dollar: $8.00; dime: $9.60; estimation to the nearest dime.
• B)Dollar: $9.00; dime: $9.60; either would be fine.
• C) Dollar: $9.00; dime: $9.60; estimation to the nearest dime.
• D)Dollar: $9.00; dime: $9.10; either would be fine.

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Definitions:

Confidence

The feeling of trust in one's abilities, qualities, and judgment.

Standard Error of Estimate

It measures the accuracy with which a sample represents a population, specifically the standard deviation of the observed values from the values predicted by a regression model.

Significance Level

The likelihood of incorrectly dismissing the null hypothesis during a statistical test when it is in fact correct; an assessment of the chance of committing a Type I error.

Negatively Linearly Related

A relationship between two variables where an increase in one variable results in a decrease in the other, represented by a downward sloping line on a graph.