Instruction 9-7
Microsoft Excel Was Used on a Set $n = 46$

question 140

True/False

Instruction 9-7
Microsoft Excel was used on a set of data involving the number of parasites found in a random sample of 46 Blue Tiger butterflies captured in Kakadu National Park. A biologist wants to know if the mean number of parasites per butterfly is greater than 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 butterflies:
$n = 46$ ; Arithmetic Mean $= 28.00$ ; Standard Deviation $= 25.92$ ; Standard Error $= 3.82$ ;
Null Hypothesis: $H _ { 0 } : \mu \leq 20.000 ; a = 0.10 ; \mathrm { df } = 45 ; T$ Test Statistic $= 2.09$ ;
One-Tailed Test Upper CriticalValue $= 1.3006 ; p$ value $= 0.021$ ; Decision $=$ Reject.
-Referring to Instruction 9-7,the biologist can conclude that there is sufficient evidence to show that the mean number of parasites per butterfly is greater than 20 with no more than a 5% probability of incorrectly rejecting the true null hypothesis.

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Definitions:

Direct Labor-Hours

An accounting metric denoting the hours worked by employees directly involved in manufacturing goods or providing services, crucial for cost allocation and pricing.

Unused Capacity

Available but not currently utilized production or service capacity within a business.

Fixed Manufacturing Overhead

Costs associated with manufacturing that do not vary with the level of production, such as rent, salaries, and insurance.

Machine-Hours

A measure of production time used in manufacturing, calculated by multiplying the number of machines by the hours they are operated.