Researchers watched groups of dolphins off the coast of Ireland in 1998 to deter

Question

Researchers watched groups of dolphins off the coast of Ireland in 1998 to determine what activities the dolphins partake in at certain times of the day ("Activities of dolphin," 2013). The numbers in table below represent the number of groups of dolphins that were partaking in an activity at certain times of days:

Which of the following statements correctly defines the null hypothesis HO?

A. the activity for dolphins is independent of the time period  

B. the activity for dolphins is not independent of the time period

C. neither of these statements is correct for HO

Explanation / Answer

The correct null hypothesis will be:

The activity for dolphins is independent of the time period.

Option A is correct.

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