A manufacturer receives parts from two suppliers. A simple random sample of 400 parts from supplier 1 finds 20 defective. A simple random sample of 200 parts from supplier 2 finds 20 defective. Let p1and p2be the proportion of all parts from suppliers 1 and 2, respectively, that are defective.

Q:What is the estimate for the difference in proportions, p₁- p_2?

Group of answer choices

A) 0.10

B) 0.067

C) 0.05

D) -0.05

Flag question: Question 14Question 143pts

Is this difference statistically significant at the 5% significance level? To determine this, test the hypothesesH₀:p₁=p₂versusH_a:p_{1 ≠ " style="max-width: 100%; height: auto; vertical-align: middle; border: 0px;">}p₂.

Group of answer choices

A) Yes

B) No

C) This cannot be determined from the information given.