Question

Question 12 (1 point) You are interested in studying whether chickadees (a small bird species) have increased stress hormones when they compete with a larger bird species for food. You design a study using 18 chickadees in the laboratory. You first measure the blood cortisol levels (ug/ul) for each bird when competing with a small bird species (finch) to measure baseline hormones. You then expose the 18 birds to competition with a larger bird (cardinal) and measure their blood cortisol level again. What analysis would you use to test the null hypothesis that the size of competitor species impacts the concentration of stress hormones? a) 2 sample t-test Ob) 1.sample t-test O ) paired t-test d) Confidence intervals Oe) Chi-square test

Answer 1

this is 2-sample t-test

Here two independent samples are drawn for the analysis of the impact of the sized of competitor species on the concentration of stress hormones.

option A