Independent, objective, nonpartisan research
Data Set

Standard Errors and Confidence Intervals for Life Expectancies

These tables present standard errors and the size of the 90 percent confidence intervals for the life expectancies reported in Table 2 of California Counts, Vol. 5, No. 4, May 2004, “The Demographics of Mortality in California.” The standard errors and confidence intervals are measures of uncertainty associated with the estimates of life expectancy. A high standard error and large confidence interval mean an estimate is less certain. The size of these measures depends on the number of deaths and the base populations for each group. Large numbers of deaths and large base populations lead to greater certainty in estimating life expectancies. These measures do not incorporate uncertainty associated with age misreporting or inconsistencies in racial and ethnic identification.

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