07 / 18 · Regression

Age remains associated with news use after adjustment

Link a coefficient forest to the adjusted mean response. OLS and HC3 intervals may differ while data and coefficients remain the same.

Classical standard errors · 944 respondents · ANES96

 Age remains associated with news use after adjustment
This preview shows the existing 16:9 slide. The Pele map below did not generate the full statistical chart.

This companion diagram explains variables, design and tests. It is distinct from the statistical figure in the standalone presentation.

 Analysis relationship map
Age: 10 years; education: 1–7 code. Urban:log(population in1000s+.1). Other covariates averaged over this sample; band is a mean CI.
Pele map source
flowchart LR
 A["Age"] --> Y["TV news"]
 E["Education code"] --> Y
 U["Urban scale"] --> Y
 P["Party group"] --> Y
 Y --> R["Conditional association"]

This actual production branch takes computed estimates and places axes, lines, intervals and labels. Shared helpers and the complete file are available below.

SVG construction branch · JavaScript
if (v.kind === "regression") {
  let rows = v.coef
    .filter((x) => x.term !== "Intercept")
    .map((x) => ({ ...x, label: short[x.term] || x.term }));
  a.push(
    ...forest(rows, {
      x: 0,
      y: 0,
      w: 980,
      labelW: 300,
      rowH: 86,
      title: "A  Unstandardized B ·95% CI",
      unit: "Times/week per term unit",
    }),
  );
  a.push(T(1080, 33, "B  Adjusted mean response", 30, C.ink, 700));
  let pp = plotFrame({
    x: 1120,
    y: 100,
    w: 440,
    h: 340,
    xRange: [15, 95],
    yRange: [
      Math.min(2, ...v.predictions.map((p) => p.lo)),
      Math.max(7, ...v.predictions.map((p) => p.hi)),
    ],
    xTicks: [20, 40, 60, 80],
    yTicks: [2, 3, 4, 5, 6, 7],
    xLabel: "Age (years)",
    yLabel: "TV news (times/week)",
  });
  a.push(
    ...pp.a,
    G(curve(v.predictions, pp.X, pp.Y), v.key),
    T(1095, 575, "R² = " + fmt(v.r2, 3) + " · N =944", 28, C.teal, 700),
  );
  note =
    "Age: 10 years; education: 1–7 code. Urban:log(population in1000s+.1). Other covariates averaged over this sample; band is a mean CI.";
  source =
    'flowchart LR\n A["Age"] --> Y["TV news"]\n E["Education code"] --> Y\n U["Urban scale"] --> Y\n P["Party group"] --> Y\n Y --> R["Conditional association"]';
  map = {
    A: v.key,
    E: rows.find((x) => x.term === "educ")?.key,
    U: rows.find((x) => x.term === "logpopul")?.key,
    P: rows.find((x) => x.term.includes("Independent"))?.key,
    Y: v.key,
    R: v.key,
  };
}

This is preserved reference code, not an executable editor.

Data
Inspect the condition data first. Replace sample, units, coefficients and confidence intervals together. Do not combine different samples or measurement levels on one scale.
Graphic
Fit axis ranges, label widths, type and colors to the target region. Preserve whether intervals include zero and recheck legibility at the final size.
Interpretation
Diagram arrows and model paths are not causal evidence. Distinguish mean-response from prediction intervals, and pointwise from simultaneous intervals.