Use the Following Table to Answer the Question(s) Below

Use the following table to answer the question(s) below.

-The producers of the Yugo automobile periodically inspect samples of 80 hoods for dents and scratches. A single flaw in a hood renders it unsuitable for installation in one of their fine automobiles. The results of the last 10 samples are shown. Calculate the standard error, s_np, for the np chart.

A) 7.75
B) 0.10
C) 0.31
D) 2.78
E) 2.95