muscrat123
  • muscrat123
Sue wants to know how many families in her small neighborhood of 50 homes would volunteer to help at a neighborhood animal shelter. She put all the addresses in a bag and drew a random sample of 25 addresses. She then asked those families if they would volunteer to help at the shelter. She found that 18% of the families would volunteer to help at the shelter. She claims that 18% of the neighborhood families would be expected to help at the animal shelter. Is this a valid inference? Yes, this is a valid inference because the 25 families speak for the whole neighborhood Yes, this is a vali
Mathematics
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SOLVED
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chestercat
  • chestercat
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muscrat123
  • muscrat123
Is this a valid inference? Yes, this is a valid inference because the 25 families speak for the whole neighborhood Yes, this is a valid inference because she took a random sample of the neighborhood No, this is not a valid inference because she only asked 25 families No, this is not a valid inference because she did not take a random sample of the neighborhood
muscrat123
  • muscrat123
@ali2x2
muscrat123
  • muscrat123
@jim_thompson5910

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jim_thompson5910
  • jim_thompson5910
what are your thoughts on this?
muscrat123
  • muscrat123
i think it is c
jim_thompson5910
  • jim_thompson5910
so you think she should have asked more families?
muscrat123
  • muscrat123
yes
jim_thompson5910
  • jim_thompson5910
but 25 families is 50% of the population 25/50 = 0.5 so I'd say she has a big enough sample size
jim_thompson5910
  • jim_thompson5910
the fact that it's random is also a good sign too
muscrat123
  • muscrat123
wait, now i think it would be b
jim_thompson5910
  • jim_thompson5910
yeah it's valid because she randomly selected families
muscrat123
  • muscrat123
thank you!
jim_thompson5910
  • jim_thompson5910
no problem

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