Test Hypotheses Regarding the Difference of Two Independent Means
-Find $\mu _ { 1 } > \mu _ { 2 }$

question 28

Multiple Choice

Test Hypotheses Regarding the Difference of Two Independent Means
-Find the standardized test statistic, t, to test the hypothesis that $\mu _ { 1 } > \mu _ { 2 }$ . Two samples are randomly selected and come from populations that are normal. The sample statistics are given below.
$$\begin{array} { l l } \mathrm { n } _ { 1 } = 18 & \mathrm { n } _ { 2 } = 13 \\\overline { \mathrm { x } } 1 = 680 & \overline { x _ { 2 } } = 665 \\\mathrm {~s} _ { 1 } = 40 & \mathrm {~s} _ { 2 } = 25\end{array}$$

• A) \(1.282\)
• B) \(3.271\)
• C) \(2.819\)
• D) \(1.865\)

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