Litter Sizes (Number of Pups) for Randomly Chosen Dogs from Two

question 74

Multiple Choice

Litter sizes (number of pups) for randomly chosen dogs from two breeds were compared. The sample data were entered into Excel, and the following results were produced. $$\begin{array}{l}\text { t-Test: Two-Sample Assuming Unequal Variances }\\\begin{array} { l r r } \hline & \text { Dalmation } & \text { Labrador } \\\hline \text { Mean } & 4.8125 & 5.461538 \\\text { Variance } & 3.4958333 & 0.602564 \\\text { Observations } & 16 & 13 \\\text { Hypothesized Mean Diff } & 0 & \\\text { df } & 21 & \\\text { t Stat } & - 1.261183 \\\hline\end{array}\end{array}$$ What is the critical value for a left-tailed test comparing the means at ? = .05?

• A)-1.645
• B)-1.721
• C)-1.703
• D)-1.699

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