TABLE 9- 1
Microsoft Excel Was Used on a Set

question 44

Multiple Choice

TABLE 9- 1
Microsoft Excel was used on a set of data involving the number of parasites found on 46 Monarch butterflies captured in Pismo Beach State Park. A biologist wants to know if the mean number of parasites per butterfly is over 20. She will make her decision using a test with a level of significance of 0.10. The following information was extracted from the Microsoft Excel output for the sample of 46 Monarch butterflies:

$\begin{array}{llcc} \hline n=46 ; \text { Arithmetic Mean }=28.00 ; \text { Standard Deviation }=25.92 ; \text { Standard Error }=3.82 ; \\\text { Null Hypothesis:} H_{0}: \mu \leq 20.000 ; \alpha=0.10 ; d f=45 ; T \text { Test Statistic} = 2.09;\\\text { One-Tailed Test Upper Critical Value} =1.3006 ;\text { p-value} =0.021 ; \text { Decision = Reject.}\\\hline\end{array}$

-Referring to Table 9-1, the parameter the biologist is interested in is

• A) the mean number of parasites on these 46 butterflies.
• B) the mean number of butterflies in Pismo Beach State Park.
• C) the proportion of butterflies with parasites.
• D) the mean number of parasites on Monarch butterflies in Pismo Beach State Park.

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Definitions:

Current Account

A segment of a nation's balance of payments that comprises the balance of trade, net primary income, and net secondary income.

Deficit

The amount by which expenses or costs exceed income or revenues, especially in the context of government budgets.

Surplus

A condition where the quantity supplied of a good exceeds the quantity demanded at the current price.

Inflation

The pace at which average prices for products and services climb, reducing the value of money.