Lab 16- One Proportion Confidence Intervals Be sure to state all necessary conditions for inference. Problem 1: To study the addictive effects of heroin, researchers for the National Institute on Drug Abuse reported that, in a random sample of 220 heroin users, 23% of them developed an opioid addiction. Create and interpret a 90% confidence interval for the true proportion of heroin users that develop an opioid addiction. inaradomsamplenceintheralfothetrueproportion of heroin users that Problem 2: A statistics professor asked his students whether or not they were registered to vote. In a sample of 50 of his students (randomly sampled from his 700 students), 35 said they were registered to vote. Find a 95% confidence interval for the true proportion of the professor's students who were registered to vote.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.