The Following MINITAB Output Presents a Confidence Interval for a Population

question 7

Multiple Choice

The following MINITAB output presents a confidence interval for a population mean.
$\begin{array}{crrrcc}\hline \text { Variable } & \mathrm{N} & \text { Mean } & \text { StDev } & \text { SE Mean } & 99 \% \mathrm{CI} \\\mathrm{x} & 23 & 139.9598 & 34.2443 & 7.1404 & (119.824,160.096) \\\hline\end{array}$

Find the critical value $t _ { \alpha / 2 }$ for a $98 \%$ confidence interval.

• A) \(2.820\)
• B) \(2.508\)
• C) \(2.500\)
• D) \(2.807\)

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Definitions:

Reverse-scored Items

Questions in a survey or test designed in such a way that high values indicate the opposite of what is being measured, used to control for response bias.

Personality Assessments

Methods or tools used to evaluate and measure an individual's personality characteristics and traits.

Agree

To have the same opinion or to accept a proposal, suggestion, or condition.

Semi-structured Interview

An interviewing method that uses both predetermined questions and the flexibility to explore responses more deeply as needed.