Wiki Page, Math 13 - Perez Sandbox : Hernia applet results

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2026-01-17T21:15:00-08:00

Results will vary. Here are some of the results we got with the applet:

Mean age for Treatment 1 = 7.88 years; Mean age for Treatment 2 = 8.71 years

Mean age for Treatment 1 = 8.3 years; Mean age for Treatment 2 = 8.25 years

Mean age for Treatment 1 = 8.46 years; Mean age for Treatment 2 = 8.13 years

With each random assignment, the mean ages for the two treatments are similar and close to the mean of the 48 children (8.29 years). Therefore, random assignment creates treatment groups with similar age distributions.

With random assignment to treatment groups, doctors can assume that the differences they observe in recovery times are due to the treatment type and not due to the influence of age on the recovery times.