A manufacturer of automobiles finds that 15% of the cars are unfit for delivery when they come off the assembly line. A worker proposes a new assembly technique which he claims will reduce the...

A manufacturer of automobiles finds that 15% of the cars are unfit for delivery when they come off the
assembly line. A worker proposes a new assembly technique which he claims will reduce the percentage of
unfit cars. His technique is tried on 80 randomly chosen cars. It turns out that 3 are defective.
Test at α = 0.05. Show all seven steps to receive full credit.