The Following Display from a TI-84 Plus Calculator Presents the Results

question 19

Multiple Choice

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two means. The sample sizes are $n _ { 1 } = 7$ and $n _ { 2 } = 12$ .


How many degrees of freedom did the calculator use?

• A) 10.791309
• B) 11.791309
• C) 0.189353
• D) -0.917205

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