21.3 Quick revision exercises

1. True or false: CIs always have 95% confidence.
   TRUE FALSE
2. True or false: The statistical validity conditions concern external validity.
   TRUE FALSE
3. True or false: CIs give intervals in which the value of a population parameter will fall.
   TRUE FALSE
4. True or false: All other things being equal, a 95% CI is wider than a 90% CI.
   TRUE FALSE
5. The multiplier times the standard error is called the
   CI margin of error sampling variation
6. A CI gives an interval in which we are fairly sure that the value of the sample statistic population parameter population sample is within.