Question

Suppose 20% of all widgets produced at a factory are defective. A simulation is used to model widgets randomly selected and then recorded as defective or working. Which simulation best models the scenario?

Answer 1

The first option is correct.

Explanation:

Sample size requirements notwithstanding, the goal is to have the number of pieces of paper marked 'defective' be equal to 20% of the total number of pieces of paper. Calling each response A, B, C, and D:

A: `5/25=0.2=20%`

B: `5/50=0.1=10%`

C: `5/100=0.05=5%`

D: `5/20=0.25=25%`

As you can see, the only scenario where there's a 20% chance of pulling a 'defective' sample is the first option, or scenario A.