A Researcher Is Estimating the Average Difference Between Two Population

question 27

Multiple Choice

A researcher is estimating the average difference between two population means based on matched-pairs samples.She gathers data on each pair in the study resulting in: $$\begin{array} { | r | r | r | } \hline {\text { Pair } } & \text { Group 1 } & \text { Group } 2 \\\hline 1 & 10 & 12 \\\hline 2 & 8 & 9 \\\hline 3 & 11 & 11 \\\hline 4 & 8 & 10 \\\hline 5 & 9 & 12 \\\hline\end{array}$$ Assume that the data are normally distributed in the population.A 95% confidence interval would be _______.

• A)-3.02 to -0.18
• B)-1.6 to -1.09
• C)-2.11 to 1.09
• D)-2.11 to -1.09
• E)-3.23 to 2.23

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Definitions:

Balance Sheet

A report detailing a company's assets, liabilities, and equity of shareholders at a certain moment.

Accounts Payable Turnover Ratio

A liquidity metric that measures how quickly a company pays off its suppliers.

Cost of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including materials and labor.

Accounts Payable

Short-term financial obligations to suppliers or creditors that a company owes for goods and services received but not yet paid for.