11 claims on pp. 23–153 (fact 10, definition 1).
In total, 1,746 individuals completed our 20-minute survey, and we weighted their responses to be representative of the national population of K–12 public school principals and the schools in which they serve.
Sample (no n: a percentage change, not a share of a sample) · a percentage that is not a share of a sample (e.g. a percentage-point change or a weighted estimate of the population)
As shown in Table B.2, assuming a 30 percent response rate (which is in line with historical ASLP surveys), this would require sampling 1,375 principals in both the other states and encouraged BTAM use only states and 2,750 principals in early legislation states.
RAND researchers used probability-based sampling to invite 5,500 ASLP members to complete the survey using the ASLP as the sampling frame.
Of the 5,500 members sampled, 1,665 principals fully completed the survey, and 181 principals partially completed the survey.
Meanwhile, 38 sampled principals were determined ineligible for the survey.
Sample (no n: a percentage change, not a share of a sample) · a percentage that is not a share of a sample (e.g. a percentage-point change or a weighted estimate of the population)
Excluding these 38 principals and the cases in which respondents did not complete a significant portion of the survey, a total of 1,746 cases received a weight. This corresponds to a 32.0 percent completion rate using the American Association for Public Opinion Research’s Response Rate 6 definition (American Association for Public Opinion Research, 2023).
Sample (n = 423 of 1307) · Table B.2 final sample, other states
Other states | 412 | 1,375 | 1,307 | 1,307 | 423 | 32.4
Sample (n = 481 of 1443) · Table B.2 final sample, encouraged BTAM use only states
Encouraged BTAM use only | 412 | 1,375 | 1,794 | 1,443 | 481 | 33.3
Sample (n = 842 of 2750) · Table B.2 final sample, early legislation states
Early legislation states | 826 | 2,750 | 3,219 | 2,750 | 842 | 30.6
Sample (n = 1746 of 5500) · Table B.2 final sample, all states
All | 1,650 | 5,500 | 6,320 | 5,500 | 1,746 | 31.7
survey response weight (the inverse of modeled probability of a principal completing the survey. The response adjustment is important to eliminate observed sources of response bias).
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