A survey found that 73% of a random sample of 8344 American adults approved of cloning endangering animals. Find the margin of error for the survey if we want 90% confidence in her estimate of the percentage of American adults who approve the cloning of endangered animals. 

Suppose that a poll, taken 10 years ago found that 69% of parents spank their children. Suppose a recent poll of 200 adults with children finds that 119 indicated that they spank their children. Assuming parents' attitude toward spanking has not changed since the original poll, how many of the 200 parents surveyed would be expected to spank their children? Do the results of the survey suggest that parents' attitude toward spanking may have changed since the original poll? Why? We would expect parents to spank their children. (Round to the nearest whole number as needed.) Do the results of the survey suggest that parents' attitude toward spanking may have changed since the original poll? Choose the correct answer below O A. Yes, 119 is more than two standard deviations from the expected number of adults who spank OB. No, 119 is within one standard deviation of the expected number of adults who spank O c. Yes, 119 is less than the expected amount of adults that spank their children. O D.…

A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%? A previous study indicates that the proportion of left-handed scientists is 8%.

Most adults would erase their personal data from the internet if they could. A software firm survey of595 adults showed that 50.3%of them would erase all their personal data if they could. Make a subjective estimate to decide whether the results are significantly low, or high, and then state a conclusion about the original claim.