Abstract
This chapter provides an overview of confidence intervals. A point estimate in the majority of situations equals the unknown value of the parameter being estimated with either an extremely small probability or zero probability. The chapter discusses the relation between the confidence intervals and the tests of hypotheses. If a confidence interval exists for the value of some parameter, then the problem of finding it becomes one of finding a test of hypothesis. However, if a confidence interval exists, it does not necessarily follow a test of hypothesis for that parameter yields that particular confidence interval or any other confidence interval.
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