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Determine which of the following situations involve(s) calculations of sample means.

I. Survey $15\text{ people}$ and define $X$ as the number of people who eat fast food every day.
II. It has been determined that $29\text{ students}$ out of the $35$ in Joe’s calculus class are passing.
III. In a survey of $15$ high school females, the average weight was $117\text{ lbs}$.

A

I only.

B

II only.

C

III only.

D

I and II only.

E

II and III only.

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