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

question 24

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 $n _ { 1 } = 10$ and $n _ { 2 } = 15$ .

How many degrees of freedom did the calculator use?

• A) -0.439
• B) -41.874
• C) 19.678187
• D) 80.827

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Definitions:

Power Method

An algorithm in numerical analysis to compute the largest eigenvalue of a matrix.

Positive Integers

Positive integers are whole numbers greater than zero, including numbers like 1, 2, 3, and so on, without any decimal or fractional part.

Long Value

A larger integer data type in programming that can store wider range of values than the standard integer type.

Arguments

Data passed to functions or procedures during their invocation to affect their behavior or output.