Table 12 Calculation of Response Rate
From: Teaching evolution in U.S. public middle schools: results of the first national survey
Number | |
|---|---|
Total mailed | 5014 |
Total useable surveys (complete + partial) | 1499 |
Confirmed/assumed eligible among non-returned (codes 21 + 32) | 423 |
Confirmed ineligible (41 + 42) | 171 |
Total non-response of unknown eligibility (22 + 23 + 31 + 33) | 2920 |
“e”—Estimated % eligible among non-returns of unknown eligibility* | 73% |
Estimated eligible (e × (22 + 23 + 31 + 33)) + (21 + 32) | 2555 |
RR4 (completes + partials)/(completes + partials + estimated eligible) | 37.0% |