Statistics 95% Confidence Interval?
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A weight loss center provided a weight loss for 72% of its patients. The center’s leader decides to test a new strategy on a random sample size of 130 and found weight loss in 78% of the people. Create a 95% cofidence interval for the proportion of participant weight loss.
95% confident the proportion of weight loss is between __ % and __ %????
[.78 - 1.96*sqrt(.72*.28/130), .78 + 1.96*sqrt(.72*.28/130)]
= [.7028, .8572]
95% confident the proportion of weight loss is between 70.28% and 85.72%.