# Suppose that you take 500 simple random samples from a population and that, for each sample, you obtain a 90% confidence interval for an unknown param

Suppose that you take 500 simple random samples from a population and that, for each sample, you obtain a 90% confidence interval for an unknown parameter. Approximately how many of those confidence intervals will not contain the value of the unknown parameter?
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diskusje5
Given: 500 samples with 90% confidence intervals.
We then expect 90% of the 500 confidence intervals to contains the value of the unknown parameter. 90% x 500=0.90 x 500 = 450
Thus we expect 450 confidence intervals to contains the value of the unknown parameter.