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Based on a study of a 10,000 person sample of the adult population of Country Y, the unbroken curve on the graph plots an association between daily consumption of various amounts of Beverage Z and the relative risk of contracting Disease X compared to the risk with no consumption of Beverage Z (indicated by 1.00). For the entire adult population of Country Y, the relative-risk values could—because of sampling error—be either higher or lower than for the particular 10,000 person sample studied. Thus the two broken lines show the estimates of how high or how low those relative-risk values for that population could be.
From the drop-down menus, select the options that create the statement that is most strongly supported by the information provided.
| Text Component | Literal Content | Simple Interpretation |
|---|---|---|
| Study Sample | "10,000 person sample of the adult population of Country Y" | Study examines 10,000 adults from Country Y. |
| Measurement | "association between daily consumption of various amounts of Beverage Z and the relative risk of contracting Disease X" | How drinking different amounts of Beverage Z affects risk of Disease X. |
| Baseline | "no consumption of Beverage Z (indicated by 1.00)" | Baseline risk (1.00) is for those who don't drink Beverage Z. |
| Solid Line | "unbroken curve on the graph plots an association..." | Solid curve shows relative risk for different consumption levels in the sample. |
| Statistical Variation | "relative-risk values could—because of sampling error—be either higher or lower..." | Results may be slightly higher or lower for the whole population due to sampling. |
| Confidence Bounds | "two broken lines show the estimates of how high or how low those relative-risk values...could be" | Broken/dotted lines show statistical range of possible population risk estimates. |
| Chart Component | What's Shown | Interpretation |
|---|---|---|
| Type | Single-panel line chart, three lines | Shows main sample result and its uncertainty |
| X-axis | 100 ml glasses of Beverage Z per day (0–12) | Range of daily Beverage Z consumption levels |
| Y-axis | Relative risk (0.75–1.20), with reference line at y=1.00 | y<1.00: less risk than baseline; y>1.00: more risk |
| Solid black line | U-shaped curve, lowest point at 4–6 glasses | Moderate consumption (4–6 glasses) linked to lowest risk |
| Dotted blue lines | Upper/lower 95% confidence intervals, follow same U-shape | Shows uncertainty; pattern is reliable |
| Trend | Risk falls with moderate consumption, returns to baseline at higher | Too much or too little Beverage Z less protective; moderate is optimal |
Compared to the risk with no consumption of Beverage Z, the reduction in relative risk of contracting Disease X for adults of Country Y is [BLANK 1]
when the daily consumption of Beverage Z is in the range of [BLANK 2] 100 mg glasses
Greatest risk reduction is observed at the lowest point of the U-shaped curve, which occurs when consuming 4-6 glasses of Beverage Z daily. This suggests that moderate intake provides optimal benefit, while both lower and higher amounts provide less reduction in risk.
Blank 1 and Blank 2 are dependent. To answer Blank 2, you must first understand where the greatest risk reduction occurs, as established in Blank 1.