Question

Climate Change In July 2015, a poll asked a random sample of 1236 registered voters in Iowa whether they agree or disagree that the world needs to do more to combat climate change. The results show that 65% agree, while 25% disagree and 10% don't know. (a) Is the sample likely to be representative of all registered voters in Iowa? (b) Is it reasonable to generalize this result and estimate that of all registered voters in Iowa agree that the world needs to do more to combat climate change?

Answer 1

Ans:

a)

population is all registered voter of Iowa.

sample is 1236 registered voters of Iowa.

Yes,sample is likely to be representative of all registered voters in Iowa,as sample size is sufficiently large and sample is taken randomly.

b)

Yes,we can estimate population parameter based on sample statistic, if sample is sufficiently large.

So,we can generalize the result.