In a study of a proposed approach for diabetes prevention, 339 people under the age of 20 who were thought to be at high risk of developing type I diabetes were assigned at random to one of two groups. One group received twice- daily injections of a low dose of insulin. The other group (the control) did not receive any insulin but was closely monitored. Summary information (from the article €œDiabetes Theory Fails Test,€ USA Today, June 25, 2001) follow.

Use the given information to construct a 90% confidence interval for the difference in the proportion that develop diabetes for the no insulin and the insulin treatments.

Transcribed Image Text:

Group Insulin Control Number Developing Dlabetes 25 24 169 170