In a study on the ecological impact of malarial infection in the lizard Scelopons occidentalis, researchers caught 15 lizards with the malarial parasite Plasmodium and 15 without. Researchers measured the distance (meters) each lizard could run in two minutes (as a measure of stamina). The following is the code and R output from the "t.test" function. t.test (x-infected, y-uninfected) Welch Two Sample t-test data: infected and uninfected t - -1.9658, df = 27.239, p-value - 0.05959 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: -10.9523489 0.2323489 sample estimates: mean of x mean of y 26.87333 32.23333 What is the upper bound of the confidence interval? Oa. 26.8733 Ob.0.2323 Oc. 32.2333 Od.-10.9523

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In a study on the ecological impact of malarial infection in the lizard Scelopons occidentalis, researchers caught 15 lizards with the malarial parasite Plasmodium and
15 without. Researchers measured the distance (meters) each lizard could run in two minutes (as a measure of stamina).
The following is the code and R output from the "t.test" function.
t.test (x=infected, y=uninfected)
Welch Two Sample t-test
data:
infected and uninfected
t = -1.9658, df = 27.239, p-value = 0.05959
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
-10.9523489
0.2323489
sample estimates: mean of x mean of y
26.87333
32.23333
What is the upper bound of the confidence interval?
Oa. 26.8733
Ob. 0.2323
Oc. 32.2333
Od.-10.9523
Transcribed Image Text:In a study on the ecological impact of malarial infection in the lizard Scelopons occidentalis, researchers caught 15 lizards with the malarial parasite Plasmodium and 15 without. Researchers measured the distance (meters) each lizard could run in two minutes (as a measure of stamina). The following is the code and R output from the "t.test" function. t.test (x=infected, y=uninfected) Welch Two Sample t-test data: infected and uninfected t = -1.9658, df = 27.239, p-value = 0.05959 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: -10.9523489 0.2323489 sample estimates: mean of x mean of y 26.87333 32.23333 What is the upper bound of the confidence interval? Oa. 26.8733 Ob. 0.2323 Oc. 32.2333 Od.-10.9523
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