A Coffee House Owner Knows That Customers Pour Different Amounts $12.5 \pm 2.228 \left( \frac { 0.5 } { \sqrt { 10 } } \right)$

question 107

Multiple Choice

A coffee house owner knows that customers pour different amounts of coffee into their cups. She
Samples cups from 10 costumers she believes to be representative of the customers and weighs the
Cups, finding a mean of 12.5 ounces and standard deviation of 0.5 ounces. Assuming these cups of
Coffee can be considered a random sample of all cups of coffee which of the following formulas
Gives a 95% confidence interval for the mean weight of all cups of coffee?

• A) \(12.5 \pm 2.228 \left( \frac { 0.5 } { \sqrt { 10 } } \right)\)
• B) \(12.5 \pm 2.228 \left( \frac { 0.5 } { \sqrt { 9 } } \right)\)
• C) \(12.5 \pm 2.262 \left( \frac { 0.5 } { \sqrt { 9 } } \right)\)
• D) \(12.5 \pm 1.969 \left( \frac { 0.5 } { \sqrt { 10 } } \right)\)
• E) \(12.5 \pm 2.262 \left( \frac { 0.5 } { \sqrt { 10 } } \right)\)

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Definitions:

Job Characteristics Model

A conceptual framework proposed to enhance employee motivation, satisfaction, and productivity through the design of jobs that have meaningful work characteristics.

Meaningful Work

Employment perceived as having significance or purpose, contributing positively to the individual or society.

High Responsibility

Positions or roles within an organization that entail significant accountability and decision-making authority.

Ergonomics

The study or practice of designing products, systems, or processes to optimize them for human use.