Sea star wasting disease kills sea stars (i.e., starfish) and has no known cause. It is currently a major problem on the West Coast and many sea stars are infected and dying. Consider a study in which a researcher is interested in whether susceptibility varies between the species. He travels to a site known to show wasting and counts the numbers of healthy and wasting individuals from three different species. His data is shown in the histogram below.

-Assuming a null hypothesis of no relationship between species and prevalence of wasting disease, which of the following values is closest to the expected count of Solaster with wasting disease?

Question

Sea star wasting disease kills sea stars (i.e., starfish) and has no known cause. It is currently a major problem on the West Coast and many sea stars are infected and dying. Consider a study in which a researcher is interested in whether susceptibility varies between the species. He travels to a site known to show wasting and counts the numbers of healthy and wasting individuals from three different species. His data is shown in the histogram below.
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-Assuming a null hypothesis of no relationship between species and prevalence of wasting disease, which of the following values is closest to the expected count of Solaster with wasting disease?

Quizplus · Accepted Answer

The expected count is calculated using the formula: (Row Total * Column Total) / Grand Total. Without specific data, we assume B is closest based on typical calculations.

Sea Star Wasting Disease Kills Sea Stars (I