Question

Sam wants to know how many families in his neighborhood plan to attend the neighborhood cookout. He puts all 100 of the neighborhood addresses in a hat and draws a random sample of 25 addresses. He then asks those families if they plan to attend the cookout. He finds that 15% of the families plan to attend the cookout. He claims that 15% of the neighborhood families would be expected to attend the cookout. Is this a valid inference?
Yes, this is a valid inference because he took a random sample of the neighborhood

Yes, this is a valid inference because the 25 families speak for the whole neighborhood

No, this is not a valid inference because he asked only 25 families

No, this is not a valid inference because he did not take a random sample of the neighborhood

Answer 1

The third one, because he only asked 25 families, and not even half of those families were going. He did not ask atleast 50% of the neighborhood