The Following MINITAB Output Display Presents a 95% Confidence Interval

question 44

Multiple Choice

The following MINITAB output display presents a 95% confidence interval for the difference between two proportions. $\begin{array} { l r r c } \text { Sample } & \mathrm { X } & \mathrm { N } & \text { Sample P } \\ 1 & 29 & 628 & 0.046178 \\ 2 & 106 & 625 & 0.169600 \end{array}$

Difference $= p ( 1 ) - p ( 2 )$
Estimate for difference: $- 0.123422$
$95 \%$ CI for difference: $( - 0.152 , - 0.095 )$

What is the point estimate of $p _ { 1 } - p _ { 2 }$ ?

• A) -0.123422
• B) 0.215778
• C) 0.108
• D) 0.057

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Definitions:

Rate of Decrease

A measure that indicates how quickly a quantity diminishes over time.

Base Value

A reference point used in the calculation of variables, such as index numbers, from a specific base date.

Percentage

A fraction or ratio expressed as a part of 100, used to denote proportion or comparison between quantities.

Missing Value

An absent data point or entry in a dataset, which may occur for various reasons and can impact the analysis if not properly handled.