3.6.6 Quiz: Simpson: Paradox and Confounding The following table shows hypothetical data for two experimental treatments (Treatment A and Treatment B) against two stages of cancer (Early and Advanced). "Remission" indicates a successful treatment. "Rate" is the proportion of remissions. Early Advanced Remis- Death Rate Remis- Death Rate sions sions 5 833 6 400 B 10 .714 4 200 This table shows the same data aggregated into a two-way table. Remissions Deaths Rate A 9 .563 B 11 8 579 What's the lurking variable when the data for Early and Advanced cancers are combined? A. Quality of hospital (Good or Poor) O B. Treatment method (A or B) O C. Stage of cancer (Early or Advanced) O D. Quality of treatment (Good or Poor) O E. Number of treatments