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# Mean and Standard Deviation

APSTAT-FXL1ME

On a recent statistics exam at a large university, $35$ of $50$ students in one section passed the exam.

What is the mean and standard deviation of the proportion of those who passed the exam?

A

Mean = $35\%$; standard deviation = $6.48\%$

B

Mean = $70\%$; standard deviation = $3.5\%$

C

Mean = $70\%$; standard deviation = $6.48\%$

D

Mean = $35\%$; standard deviation = $6.48\%$

E

Mean = $70\%$; standard deviation = $4.2\%$