Instruction 9-1
Microsoft Excel Was Used on a Set of Data

question 164

True/False

Instruction 9-1
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: $H _ { 0 } : \mu \leq 20.000 ; \alpha = 0.10 ; \mathrm { df } = 45 ; T$ Test Statistic = 2.09;
One-Tailed Test Upper Critical Value $= 1.3006 ; p$ -value $= 0.021 ;$ Decision $=$ Reject.
-Referring to Instruction 9-1,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 1% probability of incorrectly rejecting the true null hypothesis.

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Definitions:

Calories

A unit of energy used to quantify the amount of energy provided by foods and beverages.

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to and removing waste from the fetus via the umbilical cord.

Third Stage

In various contexts, refers to a specific phase in a multi-stage process; its exact meaning can depend on the process being described.

Acrosome

A vesicle at the tip of a sperm cell that helps the sperm penetrate the egg.