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

question 68

Short Answer

Test Hypotheses Regarding the Difference of Two Independent Means
-Test the hypothesis that $\mu _ { 1 } = \mu _ { 2 }$ . Two samples are randomly selected from normal populations. The sample statistics are given below.
$$\begin{array} { l l } \mathrm { n } _ { 1 } = 14 & \mathrm { n } _ { 2 } = 12 \\\overline { \mathrm { x } } 1 = 21 & \overline { \mathrm { x } } 2 = 22 \\\mathrm {~s} _ { 1 } = 2.5 & \mathrm {~s} _ { 2 } = 2.8\end{array}$$

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Definitions:

Direct Materials

Direct materials are raw materials that are directly used in the production of a product and are an integral part of the finished product.