Medal!

About 5% of a certain type of wall nails made by a hardware supplier exceeds the requirement of being able to support 500 pounds of weight. The supplier decides to remove these nails and sell them as premium wall nails. What will happen to the standard deviation of the weight the regular nails can support?
A.
It will increase.
B.
It will decrease.
C.
It will not change at all.
D.
The effect is unknown.

I got B for my answer, is that correct?

Question

Medal!

About 5% of a certain type of wall nails made by a hardware supplier exceeds the requirement of being able to support 500 pounds of weight. The supplier decides to remove these nails and sell them as premium wall nails. What will happen to the standard deviation of the weight the regular nails can support?
	A.	
It will increase.
	B.	
It will decrease.
	C.	
It will not change at all.
	D.	
The effect is unknown.

I got B for my answer, is that correct?

anonymous · Answer

@agent0smith

phi · Answer

yes.  when you toss out the 5%, you have a narrow distribution, and the standard deviation is smaller.