. . . . "OLS slope of child height (daughters x1.08) on midparentHeight over all children; 95% interval from a family-cluster bootstrap (2000 resamples, seed 1889)." . . "Measured: 0.7126 slope of child height on mid-parent height (inch per inch) (n = 934, 95% cluster-bootstrap interval [0.613, 0.814]). Interpretation: The claim is the specific fraction two-thirds for mid-parent to child, 'on the average of many cases'. Galton computed it from this same material (Table 11), so the test is a recount with modern regression rather than independent data; an independent cohort is a second test. Mid-parent is (father + 1.08 x mother)/2 as in the dataset's midparentHeight column." . "Claim test of galton1889-02: supports, confidence 0.85" . . . "Planned datasets: histdata-galtonfamilies" . "claim-test/0.1.0" . "biological" . "The 95% interval excludes 0.667 and its nearest bound is more than 0.10 away from 0.667: refutes (regression exists but not at the stated fraction). Interval excludes 0.667 by 0.10 or less: mixed. Fewer than 500 children parsed: inconclusive." . "All four Galton tests use this one dataset, which is the material Galton himself summarised; they are a recount with modern regression, not independent evidence, and count as one dataset for any aggregate." . "Galton's Table 11 used 928 children binned to the inch; HistData has 934 individual heights, so small differences from his 2/3 are expected even if his arithmetic was right." . "Slope of child height (daughters x1.08) on mid-parent height, OLS over all 934 children, has a 95% confidence interval (family-cluster bootstrap, 2000 resamples) that contains 0.667: supports." . "The 95% interval excludes 0.667 and its nearest bound is more than 0.10 away from 0.667: refutes (regression exists but not at the stated fraction). Interval excludes 0.667 by 0.10 or less: mixed. Fewer than 500 children parsed: inconclusive." . "0.85"^^ . . "supports" . "If Galton's law holds as stated, the ordinary least-squares slope of adult child height on mid-parent height in his own family records is two-thirds, with daughters' heights multiplied by 1.08 as he did." . "OLS slope of child height (daughters x1.08) on midparentHeight over all children; 95% interval from a family-cluster bootstrap (2000 resamples, seed 1889)." . "Slope of child height (daughters x1.08) on mid-parent height, OLS over all 934 children, has a 95% confidence interval (family-cluster bootstrap, 2000 resamples) that contains 0.667: supports." . "true"^^ . . "" . "GPL (HistData); 1886 records public domain" . . "Dataset: Galton's family height records (1886), Hanley (2004) transcription, HistData::GaltonFamilies via the Rdatasets CSV mirror" . . . "sha256:b1fc91e4d4b9604661967dcc62ff1055eaa3020c4d5c42d1f9d588f74b9b3317" . . "delphisci claim tester (claude-fable-5.1; evolution-after-darwin-tests-1)" . . . "claude-fable-5.1" . . . . . . . . . "2026-11-08T16:24:31.866Z"^^ . . . . . "Claim test of galton1889-02: supports, confidence 0.85" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "UpPFJelrmHMx9LP2112qTDjazUXc7+f2zc+FZt7UZpBJjLelzCNkg2BKqCaMQ6y2itS2JOahaC1/WrBkOTpGS9U6sN71sOcF8xYnRpbZ+XxkMOhRFeXKZAD8pSz1hz5enZl2ueDLm4RZLC2fziVG0cB/wX0FFIFzkbyLC0uppyr+cEYYZyglQyNOFzpef2iD9/cLdMbZNG95lZy7V1j2txrne00GPVYr78uuZT6+UK3O9RpVf1Hz65n/TPFrdeKton1pl94VkYVVnHTRpbEvMfnFIvRRRhpwLIHuAx8CfLxnPbIF5mzvfJQZRqHps/Zde0nwTjmys5QKaPEwdovSVg==" . . .