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:
n = 46; Arithmetic Mean = 28.00; Standard Deviation = 25.92; Standard Error = 3.82; Null Hypothesis: H 0 : µ c 20.000; a = 0.10; df = 45; T Test Statistic = 2.09;
One- Tailed Test Upper Critical Value = 1.3006; p- value = 0.021; Decision = Reject.
-Referring to Table 9-1, the evidence proves beyond a doubt that the mean number of parasites on butterflies in Pismo Beach State Park is over 20.

Question

Quizplus · Accepted Answer

The evidence from the hypothesis test suggests that the mean number of parasites is over 20, but it does not prove it beyond a doubt; statistical tests provide evidence, not absolute proof.

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