Question

jack wants to know how many families in his neighborhood of 60 homes would help organize a neighborhood fund raising party. He put all the addresses in a bag and drew a random sample of 30 addresses. He then asked those families if they would help organize the fund raising party. He found that 12% of the families would help organize the party. He claims that 12% of the neighborhood families would be expected to help organize the party. is this a valid inference?
A.No,this is not valid because he asked only 30 families
B.No,this is not valid because he did not take a random sample the the neig

Answer 1

@kidrah69

Answer 2

@Michele_Laino

Answer 3

I think it is A, since 12% of 30 families, of 60 homes, is:
\[\frac{{12}}{{100}} \times \frac{{50}}{{100}} = \frac{{600}}{{10000}} = \frac{6}{{100}} = 6\% \]
of the whole sample

Answer 4

okay thx ^.^

Answer 5

thanks!