Assume That 10% of Students at a University Wear Contact $\sigma = 4.5 \%$

question 20

Multiple Choice

Assume that 10% of students at a university wear contact lenses.We randomly pick 200 students.What is the standard deviation of the proportion of students in this group who may wear contact lenses?

• A) \(\sigma = 4.5 \%\)
• B) \(\sigma = 2.24 \%\)
• C) \(\sigma = 2.12 \%\)
• D) \(\sigma = 4.47 \%\)
• E) \(\sigma = 4.24 \%\)

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