Table 2

Average widths of 95% CIs for the mean using different sample sizes to estimate establishment

Sample size taken for the estimateAverage CI width (WTE)Average precision (%)Number units with CI width 1 WTE or lessNumber units with CI width 2 WTE or lessNumber of units*
202.94.132786
402.13.075686
601.72.5106486
801.52.1207286
1001.31.9317482
1201.21.8397481
1401.11.6447481
1601.11.5507580
1801.01.4537377
  • *Because units with establishment and/or specialty changes were treated as separate units for analysis, the total exceeds the number of units participating in the study. As the available data for some units was less than the sample required for the estimate, the number of units for larger samples is reduced.

  • WTE, whole time equivalent.