STAT 2040 Chapter Notes - Chapter 8: Confidence Interval, Simple Random Sample, Sample Size Determination
20 Mar 2017
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Document Summary
Intervals are calculated using sample data and give a ge of plausible valves for parameter the valve e. A point of the sample portion is a point of estimate. Of p . estimate is a single valve that is an estimate of a parameter not considered to be considered sufficient enough information a measure of the. Uncertainty associated wl that estimate is required . There are many ways of expressing the uncertainty associated wl the estimate and confidence intervals are a v. Confidence level confluence intervals for parameters never for a statistic. 991 etc the probability that the interval will capture the true value of the parameter. Known confidence intervals for the pop . mean. N , start wl the sample mean and add or. E interpret the confidence interval we must make a few assumptions. Pop . must be normally distributed normality assumption is. Important only for small sample sizes general a ( i.
