Point and Interval Estimates A point estimate is a single number or single sample statistic that is used to estimate the true value of population parameter(for example,the sample mean is a point estimate of the population mean) a confidence interval provides additional information about variability.The interval has a specified confidence or probability of correctly estimating the true value of the population parameters. Lower Upper Confidence Confidence Point Estimate Limit Limit Width of confidence interval (e.g.,95%certainty the interval includes the population mean) Statistics for Ma agers Using Microsoft Excel Chap 7-5Statistics for Managers Using Microsoft Excel Chap 7-5 Point and Interval Estimates  A point estimate is a single number or single sample statistic that is used to estimate the true value of population parameter (for example, the sample mean is a point estimate of the population mean)  a confidence interval provides additional information about variability. The interval has a specified confidence or probability of correctly estimating the true value of the population parameters. Point Estimate Lower Confidence Limit Upper Confidence Limit Width of confidence interval (e.g., 95% certainty the interval includes the population mean)