Construct and Interpret Confidence Intervals Regarding the Difference of Two $95 \%$

question 55

Multiple Choice

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means
-Construct a $95 \%$ confidence interval for $\mu _ { 1 } - \mu _ { 2 }$ . Two samples are randomly selected from normal populations.
The sample statistics are given below.
$\begin{array} { l l } \mathrm { n } _ { 1 } = 11 & \mathrm { n } _ { 2 } = 18 \\ \overline { \mathrm { x } } 1 = 4.8 & \overline { \mathrm { x } _ { 2 } } = 5.2 \\ \mathrm {~s} _ { 1 } = 0.76 & \mathrm {~s} _ { 2 } = 0.51 \end{array}$

• A) \(( - 0.977,0.177 )\)
• B) \(( - 4.152,3.981 )\)
• C) \(( - 2.762,2.762 )\)
• D) \(( - 1.762,1.762 )\)

---

Definitions:

Body Language

Body language refers to the non-verbal cues communicated through facial expressions, gestures, posture, and bodily movements, which can convey feelings and intentions beyond spoken words.

Reverse Communication

A communication flow where information moves from the lower levels of a hierarchy to the upper levels, often used to gather feedback or inputs from employees.

Communication Strategy

A plan that outlines how to communicate effectively within an organization or between organizations.

Secrecy And Control

Practices of limiting information access and exerting authority to manage operations or information flow within an organization.