Question

Schadek Silkscreen Printing Inc. purchases plastic cups and imprints them with logos for sporting events, proms, birthdays, and other special occasions. Zack Schadek, the owner, received a large shipment this morning. To ensure the quality of the shipment, he selected a random sample of 300 cups and inspected them for defects. He found 15 to be defective. What is the estimated proportion defective in the population?

Answer 1

Answer: 0.05

Step-by-step explanation:

Given : To ensure the quality of the shipment, he selected a random sample of 300 cups and inspected them for defects. He found 15 to be defective.

i.e. sample size : n= 300

sample proportion : $\hat{p}=\dfrac{15}{300}=0.05$

The best estimate for population proportion is the sample proportion.

Therefore, the estimated proportion defective in the population : 0.05