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Medicine and Clinical Studies

The drugs Ritalin and Adderall are designed to stimulate the central nervous system and are widely prescribed for children diagnosed with attention deficit disorder (ADD). Suppose a random sample of girls and boys in 12th grade was obtained and the following results were obtained.

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a. Find a 95% confidence interval for the true proportion of 12th-grade girls who are taking Ritalin/Adderall.

b. Find a 95% confidence interval for the true proportion of 12th grade boys who are taking Ritalin or Adderall.

c. Is there any evidence to suggest that the proportion of girls in this age group taking Ritalin or Adderall is different from the proportion of boys? Justify your answer.

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