Assume That You Want to Test the Claim That the Paired

question 59

Multiple Choice

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is $\mu _ { \mathrm { d } } = 0$ . Compute the value of the $t$ test statistic.
-A farmer has decided to use a new additive to grow his crops. He divided his farm into 10 plots and kept records of the corn yield (in bushels) before and after using the additive. The results are shown below. $\begin{array} { l l l l l l l l l l l } \text { Plot: } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\\text { Before } & 9 & 9 & 8 & 7 & 6 & 8 & 5 & 9 & 10 & 11 \\ \text { After } & 10 & 9 & 9 & 8 & 7 & 10 & 6 & 10 & 10 & 12 \end{array}$
You wish to test the following hypothesis at the 5 percent level of significance.
$$\mathrm { H } _ { \mathrm { O } } : \mu _ { \mathrm { D } } = 0 \text { against } \mathrm { H } _ { 1 } : \mu _ { \mathrm { D } } \neq 0 \text {. }$$ What is the value of the appropriate test statistic?

• A)2.536
• B)1.584
• C)5.014
• D)2.033

---

Definitions:

Variable Expenses

Costs that change in proportion to business activity or output levels, such as materials costs and utility expenses directly linked to production.

Fixed Expenses

Fixed expenses are consistent costs that do not vary with the volume of business activity, such as rent or salaries.

Net Income

The total earnings of a company after all expenses and taxes have been deducted from revenues, indicating the company's profit.

Selling Price

The amount of money charged to the customer for a product or service.