The Following Display from a TI-84 Plus Calculator Presents a 95

question 7

Multiple Choice

The following display from a TI-84 Plus calculator presents a 95% confidence interval for the difference between two means. The sample sizes are $n _ { 1 } = 15 \text { and } n _ { 2 } = 7$

Compute the point estimate of $\mu _ { 1 } - \mu _ { 2 }$

• A) 48.498
• B) -39.701
• C) 105.575
• D) -0.205

---

Definitions:

Range

The difference between the lowest and highest values in a set of data, indicating dispersion or variability.

Median

The middle value of a data set when it is arranged in ascending or descending order, or the point that divides the distribution into two equal halves.

Standard Deviation

A statistical measure of the dispersion or variation in a set of values, indicating how much the individual values differ from the mean of the set.

Social Competence

The ability to interact effectively with others, involving communication skills, empathy, and relationship-building.