Question

HELP!!


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 expected weight that the regular nails can support?
A.
It will be less than 500 pounds.
B.
It will remain unchanged at 500 pounds.
C.
It will be greater than 500 pounds.
D.
It will decrease by a factor of 5.

Answer 1

@Directrix please help?

Answer 2

Need help?

Answer 3

yes please

Answer 4

5% exceeds the requirement and are removed and sold as premium type.
The rest meet the requirement of 500 pounds, soooo...

Answer 5

the original requirement was that they hold 500 pounds, the ones that were not removed met that requirement

Answer 6

its D

Answer 7

no
they remain rated at 500 lbs

Answer 8

oh gotchya so B?

Answer 9

It depends on whether or not the hardware supplier is ensuring that EVERY nail can hold at least 500 lbs. or if the supplier is merely ensuring that the Expected Weight born by a given nail is 500 lbs....

Answer 10

But even if all the nails were able to hold at least 500lbs., removing the strongest 5% would definitely NOT leave the expected weight "unchanged"

Answer 11

So I vote for A.

Answer 12

I still vote B. The way I read the argument, 95% meet the 500 lb rating and 5% exceed it.
The load rating of the remaining 95% is not decreased just because 5% exceeded it. they remain unchanged.

Recall the the ones that exceeded the rating were removed, so what were the remaining rated at? 500 lbs.