Fig. 2 shows weighted airbag deployment rates as a function of the
NASS investigator determined EBS. This was based on 322 raw cases
(178,835 weighted cases) with a minimum of 31 raw observations
in each EBS category. Fig. 3 shows the weighted distribution of EBS
for all 749 barrier crashes. There were a total of 276 (37%) cases with
no estimate of EBS.
Table 2 shows the occupant airbag deployment rate by barrier type
for airbag equipped occupants in the available data. The weighted
values and associated percentages are shown along with the 95%
confidence intervals for the weighted proportions. Based on the RaoScott modified likelihood ratio chi-squared test, a statistically significant difference was found between airbag deployment rates for
different barrier types (p=0.033).