Epsilon Manufacturing Company Makes a Specialized Electronic Product Used in the Automotive

Multiple Choice

Epsilon Manufacturing Company makes a specialized electronic product used in the automotive industry.This product has 4 components, each of which could be defective.So the total number of defects of this product can be 0, 1, 2, 3, or 4.The following table provides the probabilities of the number of defects: Number of defects Probability
0 .508
1 .302
2 .105
3 .080
4 .005
The standard deviation of the number of defects is _______.

A) 0.89
B) 0.90
C) 0.91
D) 0.92
E) 0.96