The Following MINITAB Output Presents a 95% Confidence Interval for the Mean

question 129

Multiple Choice

The following MINITAB output presents a 95% confidence interval for the mean ozone Predicted Values for New Observations
$\begin{array} { l r c c c } \text { New Obs } & \text { Fit } & \text { SE Fit } & 95.0 \% \text { CI } & 95.0 \% \text { PI } \\ 1 & 37.26 & 1.3 & ( 34.71,39.81 ) & ( 24.41,50.11 ) \end{array}$

Values of Predictors for New Observations

$\begin{array} { l c } \text { New OBS } & \text { Humidity } \\ 1 & 40.0 \% \end{array}$

What is the $95 \%$ confidence interval for the mean ozone level for days when the relative humidity is $40 \%$ ?

• A) \(( 34.71,39.81 )\)
• B) \(( 24.41,50.11 )\)
• C) \(( 40,95 )\)
• D) \(( 1.3,37.26 )\)

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