# 4. A supplier of components to an electronic industry makes a sophisticated product which sometimes fails immediately it is used. He controls his manufacturing process so that the proportion of faulty products is supposed to be only 5%. Out of 400 supplies in a batch, 26 prove to be faulty. Verify the manufacturer’s claim. Use 0.05 level of significance.

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
$26/400=0.065 \\$

So claim is false.

Arun Kumar
IIT Delhi