The Following Display from a TI-84 Plus Calculator Presents a $n _ { 1 } = 15 \text { and } n _ { 2 } = 13$

question 27

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 $n _ { 1 } = 15 \text { and } n _ { 2 } = 13$

Fill in the blanks: We are 95% confident that the difference between the means is between ____ and _____.

• A) 111.710,127.190
• B) 22.760,27.064
• C) -34.165,3.205
• D) 0,23.614386

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Definitions:

Abbreviation

An abbreviated version of a word or phrase.

Craniotomy

A surgical operation in which a piece of the skull is removed to access the brain, often performed to remove tumors or relieve pressure.

Surgical Incision

A precise cut made through the skin and tissues during a surgical procedure to access or remove something within the body.

Skull

The bony structure forming the head, protecting the brain.