Question

Mark wants to know how many families in his neighborhood plan to attend the neighborhood party. He puts all 80 of the neighborhood addresses in a hat and draws a random sample of 20 addresses. He then asks those families if they plan to attend the party. He finds that 20% of the families plan to attend the party. He claims that 20% of the neighborhood families would be expected to attend the party. Is this a valid inference?
A. No, this is not a valid inference because he asked only 20 families
B. No, this is not a valid inference because he did not take a random sample of the neighborhood
C. Yes, this is a valid inference because he took a random sample of the neighborhood
D. Yes, this is a valid inference because the 29 families speak for the whole neighborhood

Answer 1

It’s C, as drawing the names from a hat makes the sample random.

Answer 2

Answer: C. (The third one)

Step-by-step explanation:

The sample is random because he pulled it out of a hat.

FLVS?