AP Stats 6-1 Confidence Intervals for Population Proportions

the sample statistic is an estimate of the _.

the sample statistic is an estimate of the population parameter (but more plausible to have interval of possible values for p).

Confidence Interval script

We are C% confident that p falls in the interval _.

Confidence Level script

If we take many samples of size n from population, about _% of them will result in an interval that captures the parameter.

confidence interval formula

point estimate +- margin of error

margin of error = z* standard deviation OF STATISTIC

the margin of error in a confidence interval covers only _. due to random sampling.

chance variation

critical value

critical value determines the boundary for our confidence interval - so how many standard deviations on either side we want to go.