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(See Steps) Two manufacturers produce two new drugs to help treat severe Hey Fever. Both drugs are known to work well but both seem to produce unpleasant side

Question: Two manufacturers produce two new drugs to help treat severe Hey Fever. Both drugs are known to work well but both seem to produce unpleasant side effects. A clinical trial is conducted to determine which drug is better.

300 Hey Fever patients are treated with drug A and 45 report side effects. Calculate a 95% confidence interval for the proportion of patients suffering side effects from drug A.

Estimate how many more patients would need to be added to the trial in order to reduce the width of the confidence interval to 0.05.

240 Hey Fever patients are treated with drug B and 35 report side effects. Test at the 1% level whether the data suggests that drug B is significantly better than drug A

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